Magnetic head and magnetic recording device

Abstract

To provide a magnetic head and a magnetic recording device capable of improving recording density. According to an embodiment, a magnetic head includes a pole, a shield, and a non-magnetic layer. The non-magnetic layer is disposed between the pole and the shield. The non-magnetic layer is in contact with the pole and the shield. The non-magnetic layer contains at least one first element selected from Cu, Au, Cr, V, Al, and Ag.

Description

[0001] This application is based on Japanese Patent Application No. 2021-136906 (Filing Date: August 25, 2021) and claims priority thereto. The entire contents of the application are incorporated herein by reference. TECHNICAL FIELD

[0002] Embodiments of the present application relate to a magnetic head and a magnetic recording device. BACKGROUND

[0003] Information is recorded on a magnetic recording medium such as a hard disk drive (HDD) using a magnetic head. It is desirable to increase the recording density in the magnetic head and the magnetic recording device. SUMMARY

[0004] Embodiments of the present application provide a magnetic head and a magnetic recording device capable of increasing the recording density.

[0005] Technical Solution to Problem

[0006] According to an embodiment, a magnetic head includes a magnetic pole, a shield, and a non-magnetic layer. The non-magnetic layer is disposed between the magnetic pole and the shield. The non-magnetic layer is in contact with the magnetic pole and the shield. The non-magnetic layer contains at least one first element selected from Cu, Au, Cr, V, Al, and Ag.

[0007] According to the magnetic head configured as described above, it is possible to provide a magnetic head and a magnetic recording device capable of increasing the recording density. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is a schematic cross-sectional view illustrating a magnetic head according to a first embodiment.

[0009] Figure 2 is a schematic cross-sectional view illustrating a magnetic recording device according to the first embodiment.

[0010] Figure 3 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment.

[0011] Figure 4 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment.

[0012] Figure 5 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment.

[0013] Figure 6 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment.

[0014] Figure 7This is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment.

[0015] Figure 8 This is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment.

[0016] Figure 9 This is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment.

[0017] Figure 10 This is a schematic cross-sectional view illustrating the magnetic head according to the second embodiment.

[0018] Figure 11 This is a graph illustrating the characteristics of the magnetic head.

[0019] Figure 12 This is a schematic cross-sectional view illustrating the magnetic head according to the third embodiment.

[0020] Figure 13 This is a schematic cross-sectional view illustrating the magnetic recording apparatus according to the third embodiment.

[0021] Figure 14 This is a schematic cross-sectional view illustrating the magnetic head according to the third embodiment.

[0022] Figure 15 This is a schematic cross-sectional view illustrating the magnetic head according to the third embodiment.

[0023] Figure 16 This is a schematic cross-sectional view illustrating the magnetic head according to the third embodiment.

[0024] Figure 17 This is a schematic cross-sectional view illustrating the magnetic head according to the third embodiment.

[0025] Figure 18 This is a schematic perspective view illustrating the magnetic recording apparatus according to an exemplary embodiment.

[0026] Figure 19 This is a schematic perspective view illustrating a portion of the magnetic recording apparatus according to an exemplary embodiment.

[0027] Figure 20 This is a schematic perspective view illustrating the magnetic recording apparatus according to an exemplary embodiment.

[0028] Figure 21 (a) and Figure 21 (b) is a schematic perspective view illustrating a portion of the magnetic recording apparatus according to an exemplary embodiment.

[0029] Label Explanation

[0030] 20, 20a-20c laminate; 20D first current circuit; 21 first magnetic layer; 21A-21C magnetic layer; 30 pole; 30D recording circuit; 30F medium facing surface; 30S shield; 30c coil; 30i insulating portion; 30p, 30q first and second partial regions; 31, 32 first and second shields; 35a, 35b first and second side shields; 41, 42 first and second non-magnetic layers; 41A-41C, 42A-42C non-magnetic layers; 50 non-magnetic layer; 50D alternating current circuit; 50i insulating member; 51-54 first to fourth non-magnetic layers; 58 conductive member; 60 recording portion; 70 reproducing portion; 71 magnetic reproducing element; 72a, 72b first and second reproducing magnetic shields; 80 magnetic recording medium; 81 magnetic recording layer; 82 medium substrate; 83 magnetization; 85 medium moving direction; 110-117, 120, 130-134 magnetic head; 150 magnetic recording device; 154 suspension; 155 arm; 156 voice coil motor; 157 bearing portion; 158 head gimbal assembly; 159 head slider; 159A air inflow side; 159B air outflow side; 160 head stack assembly; 161 support frame; 162 coil; 180 recording medium disk; 180M spindle motor; 181 recording medium; 190 signal processing portion; 210-230 magnetic recording device; AR arrow; D1 first direction; I1 first current; Ia alternating current; Iw recording current; MSF strength; T1-T3 first to third terminals; T30 pole terminal; T58 conductive member terminal; W1, W2 first and second wiring; fr frequency; t50 thickness DETAILED DESCRIPTION

[0031] (First Embodiment)

[0032] Figure 1 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment.

[0033] Figure 2 is a schematic cross-sectional view illustrating a magnetic recording device according to the first embodiment.

[0034] As shown in Figure 2 , the magnetic recording device 210 according to the embodiment includes the magnetic head 110 and the first current circuit 20D. The magnetic recording device 210 can also include the magnetic recording medium 80. At least a recording operation is performed in the magnetic recording device 210. In the recording operation, the magnetic head 110 is used to record information on the magnetic recording medium 80.

[0035] The magnetic head 110 includes the recording portion 60. As will be described later, the magnetic head 110 can also include a reproducing portion. The recording portion 60 includes the pole 30, the shield 30S, and the non-magnetic layer 50.

[0036] As Figure 1 illustrated, a non-magnetic layer 50 is provided between the magnetic pole 30 and the shield 30S. The non-magnetic layer 50 is in contact with the magnetic pole 30 and the shield 30S. The non-magnetic layer 50 contains at least one first element selected from Cu, Au, Cr, V, Al, and Ag. In this example, a first non-magnetic layer 51 is provided as the non-magnetic layer 50.

[0037] The shield 30S includes a first shield 31. The shield 30S (the first shield 31) is one of a trailing shield and a leading shield.

[0038] For example, the magnetic pole 30 and the first shield 31 form a magnetic circuit. The magnetic pole 30 is, for example, a main magnetic pole. The first shield 31 is, for example, a trailing shield.

[0039] As Figure 2 illustrated, the direction from the magnetic recording medium 80 to the magnetic head 110 is set as the Z-axis direction. One direction perpendicular to the Z-axis direction is set as the X-axis direction. The direction perpendicular to the Z-axis direction and the X-axis direction is set as the Y-axis direction. The Z-axis direction corresponds to, for example, a height direction. The X-axis direction corresponds to, for example, a down track direction. The Y-axis direction corresponds to, for example, a cross track direction. The magnetic recording medium 80 and the magnetic head 110 are relatively moved along the down track direction. A magnetic field (a recording magnetic field) generated from the magnetic head 110 is applied at a desired position of the magnetic recording medium 80. The magnetization of the desired position of the magnetic recording medium 80 is controlled to a direction corresponding to the recording magnetic field. Thus, information is recorded in the magnetic recording medium 80.

[0040] The direction from the magnetic pole 30 to the first shield 31 is set as a first direction Dl (refer to Figure 2 ). The first direction Dl is actually inclined at a small angle with respect to the X-axis direction. In an embodiment, the first direction Dl can also be inclined at a small angle with respect to the X-axis direction.

[0041] As Figure 2 illustrated, a coil 30c is provided. In this example, a portion of the coil 30c is located between the magnetic pole 30 and the first shield 31. A second shield 32 is provided in this example. In the X-axis direction, the magnetic pole 30 is present between the second shield 32 and the first shield 31. Another portion of the coil 30c is located between the second shield 32 and the magnetic pole 30. An insulating portion 30i is provided between these multiple elements. The second shield 32 is, for example, a leading shield. The magnetic head 110 can also include a side shield described later.

[0042] As Figure 2As shown, a recording current Iw is supplied from the recording circuit 30D to the coil 30c. A recording magnetic field corresponding to the recording current Iw is applied from the magnetic pole 30 to the magnetic recording medium 80.

[0043] As shown, the magnetic pole 30 includes a medium opposing surface 30F. The medium opposing surface 30F is, for example, an ABS (Air Bearing Surface). The medium opposing surface 30F is, for example, opposed to the magnetic recording medium 80. The medium opposing surface 30F is, for example, along the X-Y plane. Figure 2 As shown, the first current circuit 20D is electrically connected to the magnetic pole 30 and the first shield 31. For example, the magnetic head 110 is provided with a first terminal T1 and a second terminal T2. The first terminal T1 is electrically connected to the non-magnetic layer 50 via the first wiring W1 and the magnetic pole 30. The second terminal T2 is electrically connected to the non-magnetic layer 50 via the second wiring W2 and the first shield 31. The first current I1 (for example, direct current) is supplied from the first current circuit 20D to, for example, the stacked portion of the magnetic pole 30, the non-magnetic layer 50, and the first shield 31. The first current I1 flows, for example, from the first shield 31 to the magnetic pole 30.

[0044] Figure 2 As shown, the first current I1 is supplied to the stacked portion of the magnetic pole 30, the non-magnetic layer 50, and the first shield 31. When the first current I1 is supplied, an alternating magnetic field is generated from at least either one of the magnetic pole 30 and the shield 30S.

[0045] As shown, the first current I1 is supplied to the stacked portion of the magnetic pole 30, the non-magnetic layer 50, and the first shield 31. When the first current I1 is supplied, an alternating magnetic field is generated from at least either one of the magnetic pole 30 and the shield 30S. Figure 2 For example, in the stacked portion of the magnetic pole 30, the non-magnetic layer 50, and the first shield 31, an interaction of spins is generated by an electron flow based on the first current I1. It is considered, for example, that in a portion of the magnetic pole 30 opposed to the non-magnetic layer 50 and a portion of the shield 30S opposed to the non-magnetic layer 50, a magnetization oscillates.

[0046] In the embodiment, the non-magnetic layer 50 contains at least one first element selected from Cu, Au, Cr, V, Al, and Ag. By using such a first element, the interaction of spins is obtained.

[0047] Thus, by supplying the first current I1 above the threshold value, the magnetization oscillates. Along with the oscillation, an alternating magnetic field (for example, a high-frequency magnetic field) is generated from at least either one of the magnetic pole 30 and the shield 30S. The generated alternating magnetic field is applied to the magnetic recording medium 80, and writing to the magnetic recording medium 80 is assisted. For example, MAMR (Microwave Assisted Magnetic Recording) can be implemented. A magnetic recording device capable of improving recording density is provided.

[0048] Thus, by supplying the first current I1 above the threshold value, the magnetization oscillates. Along with the oscillation, an alternating magnetic field (for example, a high-frequency magnetic field) is generated from at least either one of the magnetic pole 30 and the shield 30S. The generated alternating magnetic field is applied to the magnetic recording medium 80, and writing to the magnetic recording medium 80 is assisted. For example, MAMR (Microwave Assisted Magnetic Recording) can be implemented. A magnetic recording device capable of improving recording density is provided.​

[0049] As shown in Figure 1 A thickness of the non-magnetic layer 50 in a direction from the magnetic pole 30 toward the shield 30S is set to a thickness t50. In an embodiment, the thickness t50 is preferably 2 nm or more and 50 nm or less. By the thickness t50 being 2 nm or more, the first shield 31 and the first side shield 35a are easily magnetically separated, for example. By the thickness t50 being 50 nm or less, interaction of spins is easily obtained, for example. By the thickness t50 being 50 nm or less, a function as a shield is easily obtained, for example. Expansion of a write magnetic field is suppressed, for example, and recording density is improved.

[0050] Figure 3 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment.

[0051] As shown in Figure 3 In the magnetic head 111 according to the embodiment, a structure of the non-magnetic layer 50 is different from that in the magnetic head 110. Structures other than the above in the magnetic head 111 can be the same as those in the magnetic head 110.

[0052] In the magnetic head 111, the magnetic pole 30 includes the medium facing surface 30F. The non-magnetic layer 50 is recessed with reference to the medium facing surface 30F. In an embodiment, an alternating magnetic field is generated from at least either one of the magnetic pole 30 and the shield 30S. The alternating magnetic field generated from the medium facing surface 30F close to the magnetic recording medium 80 is effectively applied to the magnetic recording medium 80, for example. By the non-magnetic layer 50 being recessed with reference to the medium facing surface 30F, the alternating magnetic field is easily concentrated to be generated near the medium facing surface 30F. A high-intensity alternating magnetic field is easily obtained. The alternating magnetic field is more effectively applied to the magnetic recording medium 80. Higher recording density is easily obtained.

[0053] Figure 4 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment.

[0054] As shown in Figure 4 In the magnetic head 112 according to the embodiment, the shield 30S includes the first shield 31 and the second shield 32. The non-magnetic layer 50 includes the first non-magnetic layer 51 and the second non-magnetic layer 52. Structures other than the above in the magnetic head 112 can be the same as those in the magnetic head 110.

[0055] The first shield 31 is one of the trailing shield and the leading shield. The second shield 32 is the other of the trailing shield and the leading shield. In this way, the shield 30S includes the trailing shield and the leading shield.

[0056] The first non-magnetic layer 51 is provided between the magnetic pole 30 and the trailing shield (first shield 31). The first non-magnetic layer 51 is in contact with the magnetic pole 30 and the trailing shield (first shield 31). The first non-magnetic layer 51 contains at least one selected from Cu, Au, Cr, V, Al, and Ag.

[0057] The second non-magnetic layer 52 is provided between the magnetic pole 30 and the leading shield (second shield 32). The second non-magnetic layer 52 is in contact with the magnetic pole 30 and the leading shield (second shield 32). The second non-magnetic layer 52 contains at least one selected from Cu, Au, Cr, V, Al, and Ag.

[0058] In the magnetic head 112, an alternating magnetic field (for example, a high-frequency magnetic field) is generated from at least any one of the magnetic pole 30, the first shield 31, and the second shield 32. The generated alternating magnetic field is applied to the magnetic recording medium 80. More effective MAMR can be implemented.

[0059] In the magnetic head 112, the first current II flows from the first shield 31 to the magnetic pole 30, and from the second shield 32 to the magnetic pole 30, for example.

[0060] Figure 5 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment.

[0061] As Figure 5 indicated in the magnetic head 113 according to the embodiment, the non-magnetic layer 50 (the first non-magnetic layer 51 and the second non-magnetic layer 52) is retracted with the medium facing surface 30F as a reference. Structures other than the above in the magnetic head 113 can be the same as those in the magnetic head 112.

[0062] In the magnetic head 113, by the non-magnetic layer 50 being retracted with the medium facing surface 30F as a reference, it is easy to concentrate generation of an alternating magnetic field in the vicinity of the medium facing surface 30F. It is easy to obtain a high-strength alternating magnetic field. It is possible to more effectively apply an alternating magnetic field to the magnetic recording medium 80. It is easy to obtain a higher recording density. At least any one of the first non-magnetic layer 51 and the second non-magnetic layer 52 can be retracted with the medium facing surface 30F as a reference.

[0063] Figure 6 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment.

[0064] As Figure 6 indicated in the magnetic head 114 according to the embodiment, the shield 30S can be one of the first side shield 35a and the second side shield 35b. Structures other than the above in the magnetic head 114 can be the same as those in the magnetic head 110.

[0065] In this example, the shield 30S includes a first side shield 35a and a second side shield 35b. A direction from the magnetic pole 30 to the first side shield 35a intersects with a direction from the magnetic pole 30 to the first shield 31 (refer to Figure 1 ). A direction from the magnetic pole 30 to the second side shield 35b intersects with a direction from the magnetic pole 30 to the first shield 31 (refer to Figure 1 ). The direction from the magnetic pole 30 to the first side shield 35a and the direction from the magnetic pole 30 to the second side shield 35b are, for example, along the Y-axis direction. At least a portion of the magnetic pole 30 is located between the first side shield 35a and the second side shield 35b in the Y-axis direction.

[0066] The non-magnetic layer 50 includes, for example, a first non-magnetic layer 51 and a second non-magnetic layer 52. The first non-magnetic layer 51 is provided between the magnetic pole 30 and the first side shield 35a, and is in contact with the magnetic pole 30 and the first side shield 35a. The first non-magnetic layer 51 contains at least one selected from Cu, Au, Cr, V, Al, and Ag.

[0067] The second non-magnetic layer 52 is provided between the magnetic pole 30 and the second side shield 35b, and is in contact with the magnetic pole 30 and the second side shield 35b. The second non-magnetic layer 52 contains at least one selected from Cu, Au, Cr, V, Al, and Ag.

[0068] The first current circuit 20D is electrically connected to the magnetic pole 30 via a first terminal T1, for example. The first current circuit 20D is electrically connected to the first side shield 35a via a second terminal T2. The first current circuit 20D is electrically connected to the second side shield 35b via a third terminal T3.

[0069] The first current II flows in a laminated portion including the magnetic pole 30, the first non-magnetic layer 51, and the first side shield 35a. An alternating magnetic field is generated from at least either one of the magnetic pole 30 and the first side shield 35a. The first current II flows in a laminated portion including the magnetic pole 30, the second non-magnetic layer 52, and the second side shield 35b. An alternating magnetic field is generated from at least either one of the magnetic pole 30 and the second side shield 35b. A stronger alternating magnetic field can be applied to the magnetic recording medium 80. A higher recording density is easily obtained.

[0070] The first current II flows, for example, from the first side shield 35a to the magnetic pole 30, and from the second side shield 35b to the magnetic pole 30. The first current II may, for example, also flow from the first side shield 35a to the second side shield 35b through the magnetic pole 30. The first current II may, for example, also flow from the second side shield 35b to the first side shield 35a through the magnetic pole 30. In these cases, the first terminal T1 can also be omitted.

[0071] Figure 7is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment.

[0072] As shown in Figure 7 In the magnetic head 115 according to the embodiment, the non-magnetic layer 50 (the first non-magnetic layer 51 and the second non-magnetic layer 52) is retracted with reference to the medium facing surface 30F. The structure of the magnetic head 115 other than the above can be the same as that of the magnetic head 114.

[0073] In the magnetic head 115, the non-magnetic layer 50 is retracted with reference to the medium facing surface 30F, and it is easy to concentrate the alternating magnetic field to be generated near the medium facing surface 30F. It is easy to obtain a high-strength alternating magnetic field. It is possible to more effectively apply the alternating magnetic field to the magnetic recording medium 80. It is easy to obtain a higher recording density.

[0074] Figure 8 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment.

[0075] As shown in Figure 8 The magnetic head 116 according to the embodiment includes the pole 30, the first shield 31, and the first side shield 35a. The first shield 31 is one of the trailing shield and the leading shield. The direction from the pole 30 to the first side shield 35a (for example, the direction along the Y-axis direction) intersects the direction from the pole 30 to the first shield 31 (for example, the direction along the X-axis direction).

[0076] The non-magnetic layer 50 (for example, the first non-magnetic layer 51) is provided between the first shield 31 and the first side shield 35a. The non-magnetic layer 50 (for example, the first non-magnetic layer 51) is in contact with the first shield 31 and the first side shield 35a. The non-magnetic layer 50 (for example, the first non-magnetic layer 51) contains at least one first element selected from Cu, Au, Cr, V, Al, and Ag.

[0077] In this example, the magnetic head 116 further includes the second side shield 35b. At least a part of the pole 30 is located between the first side shield 35a and the second side shield 35b.

[0078] The non-magnetic layer 50 includes the first non-magnetic layer 51 and the second non-magnetic layer 52. The first non-magnetic layer 51 is provided between the first shield 31 and the first side shield 35a, and is in contact with the first shield 31 and the first side shield 35a. The first non-magnetic layer 51 contains at least one selected from Cu, Au, Cr, V, Al, and Ag.

[0079] The second non-magnetic layer 52 is provided between the first shield 31 and the second side shield 35b, and is in contact with the first shield 31 and the second side shield 35b. The second non-magnetic layer 52 contains at least one selected from Cu, Au, Cr, V, Al, and Ag.

[0080] The second shield 32 is provided in this example. The second shield 32 is the other of the trailing shield and the leading shield.

[0081] The non-magnetic layer 50 includes a third non-magnetic layer 53 and a fourth non-magnetic layer 54. The third non-magnetic layer 53 is provided between the second shield 32 and the first side shield 35a, and is in contact with the second shield 32 and the first side shield 35a. The third non-magnetic layer 53 contains at least one selected from Cu, Au, Cr, V, Al, and Ag.

[0082] The fourth non-magnetic layer 54 is provided between the second shield 32 and the second side shield 35b, and is in contact with the second shield 32 and the second side shield 35b. The fourth non-magnetic layer 54 contains at least one selected from Cu, Au, Cr, V, Al, and Ag.

[0083] For example, the first current circuit 20D is electrically connected to the first shield 31 via the first terminal T1. The first current circuit 20D is electrically connected to the second shield 32 via the second terminal T2. The first current II flows in a layered portion including the first shield 31, the first non-magnetic layer 51, and the first side shield 35a. The first current II flows in a layered portion including the first shield 31, the second non-magnetic layer 52, and the second side shield 35b. The first current II flows in a layered portion including the second shield 32, the third non-magnetic layer 53, and the first side shield 35a. The first current II flows in a layered portion including the second shield 32, the fourth non-magnetic layer 54, and the second side shield 35b.

[0084] For example, an alternating magnetic field is generated in at least any one of the first shield 31, the first side shield 35a, the second shield 32, and the second side shield 35b. The generated alternating magnetic field is applied to the magnetic recording medium 80 (refer to Figure 1 ). Higher recording density is easily obtained.

[0085] As Figure 8As shown, a thickness of the non-magnetic layer 50 (e.g., the first non-magnetic layer 51) along a direction from the first shield 31 to the first side shield 35a is set to a thickness t50. In an embodiment, the thickness t50 is preferably 2 nm or more and 30 nm or less. By the thickness t50 being 2 nm or more, the first shield 31 and the first side shield 35a are easily magnetically separated, for example. By the thickness t50 being 50 nm or less, the interaction of spins is easily obtained, for example. By the thickness t50 being 50 nm or less, the function as a shield is easily obtained, for example. The spread of the write magnetic field is suppressed, for example, and the recording density is improved.

[0086] Figure 9 is a schematic cross-sectional view illustrating a magnetic head according to the first embodiment.

[0087] As shown, the magnetic head 117 according to the embodiment includes the pole 30 and the non-magnetic layer 50. In the magnetic head 117, the position of the non-magnetic layer 50 is different from that in the magnetic head 110. The structure of the magnetic head 117 other than the above can be the same as that of the magnetic head 110. Figure 9

[0088] In the magnetic head 117, the pole 30 includes the first partial region 30p and the second partial region 30q. The non-magnetic layer 50 (e.g., the first non-magnetic layer 51) is provided between the first partial region 30p and the second partial region 30q. The non-magnetic layer 50 contains at least one first element selected from Cu, Au, Cr, V, Al, and Ag. The pole 30 includes the medium facing surface 30F, for example. The first partial region 30p is located between the medium facing surface 30F and the second partial region 30q. The non-magnetic layer 50 can be in contact with the first partial region 30p and the second partial region 30q.

[0089] The first current II flows from the first partial region 30p to the second partial region 30q via the first non-magnetic layer 51, for example. The first current II can also flow from the second partial region 30q to the first partial region 30p via the first non-magnetic layer 51, for example. In the magnetic head 117, an alternating magnetic field is generated from the pole 30 by the first current II. The generated alternating magnetic field is applied to the magnetic recording medium 80. A higher recording density is easily obtained.

[0090] ​In this example, a second non-magnetic layer 52 is disposed between the magnetic pole 30 and the first shield 31. The second non-magnetic layer 52 is conductive. For example, a first current I1 flows in the stacked portion of the magnetic pole 30, the second non-magnetic layer 52, and the first shield 31. The second non-magnetic layer 52 contains, for example, at least one selected from Ru, Ir, Ta, Rh, Pd, Pt, and W. The second non-magnetic layer 52 may also contain, for example, at least one first element selected from Cu, Au, Cr, V, Al, and Ag. In this case, similarly to the above, an alternating magnetic field is generated from at least either the magnetic pole 30 or the first shield 31 based on the first current I1.

[0091] like Figure 9 As shown, the second non-magnetic layer 52 can also be retracted with reference to the dielectric facing surface 30F. An alternating magnetic field can be easily concentrated near the dielectric facing surface 30F. A high-intensity alternating magnetic field is easily obtained. An alternating magnetic field can be applied to the magnetic recording medium 80 more effectively. Higher recording density is easily obtained.

[0092] The magnetic recording apparatus 210 involved in the implementation (see reference) Figure 2 The device includes the aforementioned magnetic heads (heads 110-117) and a first current circuit 20D. The first current circuit 20D supplies a first current I1 between the magnetic pole 30 and the shield 30S. When the first current I1 is supplied between the magnetic pole 30 and the shield 30S, an alternating magnetic field is generated from at least one of the magnetic pole 30 and the shield 30S. This provides a magnetic recording apparatus capable of increasing recording density.

[0093] (Second Implementation)

[0094] Figure 10 This is a schematic cross-sectional view illustrating the magnetic head according to the second embodiment.

[0095] like Figure 10 As shown, the magnetic head 120 according to the embodiment includes magnetic poles 30 and conductive components 58. The structure of the magnetic head 120, except as described above, can be the same as that of the magnetic head 110.

[0096] In the magnetic head 120, the conductive component 58 is electrically connected to the magnetic pole 30. An alternating current Ia is supplied to the conductive component 58 and the magnetic pole 30. At this time, an alternating magnetic field is generated from the magnetic pole 30.

[0097] For example, a magnetic pole terminal T30 electrically connected to the magnetic pole 30 and a conductive component terminal T58 electrically connected to the conductive component 58 are provided. The magnetic recording apparatus 220 includes a magnetic head 120 and an alternating current circuit 50D. The alternating current circuit 50D is electrically connected to the magnetic pole 30 via the magnetic pole terminal T30. The alternating current circuit 50D is electrically connected to the conductive component 58 via the conductive component terminal T58.

[0098] The alternating-current circuit 50D is capable of supplying the alternating current Ia to the magnetic pole 30 and the conductive member 58 via the terminals. When the alternating current Ia is supplied to the magnetic pole 30 and the conductive member 58, an alternating magnetic field is generated from the magnetic pole 30. The generated alternating magnetic field is applied to the magnetic recording medium 80. MAMR can be effectively implemented.

[0099] Figure 11 is a graph illustrating characteristics of the magnetic head.

[0100] Figure 11 Simulation results illustrating characteristics of the alternating magnetic field obtained from the magnetic pole 30 when a high-frequency magnetic field is applied near the magnetic head including the magnetic pole 30 are illustrated. Figure 11 The horizontal axis of is the frequency fr of the applied high-frequency magnetic field. The vertical axis is the intensity MFS (relative value) of the alternating magnetic field obtained from the magnetic pole 30.

[0101] As Figure 11 indicated in, the intensity MFS of the alternating magnetic field exhibits a peak at the frequency fr of about 30 GHz. This is considered to correspond to a case where at least a part of the magnetic pole 30 resonates with the applied high-frequency magnetic field.

[0102] By supplying the alternating current Ia to the conductive member 58 and the magnetic pole 30, a magnetic field generated by the alternating current Ia is applied to the magnetic pole 30. It is considered that the magnetization of the magnetic pole 30 resonates with the alternating current Ia by the energy of the alternating current Ia.

[0103] For example, by passing the alternating current Ia through the magnetic pole 30, an alternating magnetic field based on resonance in the magnetic pole 30 is applied to the magnetic recording medium 80. MAMR can be implemented. A part of the alternating magnetic field based on the alternating current Ia flowing in the conductive member 58 can also be further applied to the magnetic recording medium 80. More effective MAMR can be implemented.

[0104] (3rd Embodiment)

[0105] Figure 12 is a schematic cross-sectional view illustrating the magnetic head involved in the 3rd embodiment.

[0106] Figure 13 is a schematic cross-sectional view illustrating the magnetic recording apparatus involved in the 3rd embodiment.

[0107] As Figure 13 indicated in, the magnetic recording apparatus 230 involved in the embodiment includes the magnetic head 130 and the 1st current circuit 20D. The magnetic recording apparatus 230 can also include the magnetic recording medium 80. At least a recording operation is performed in the magnetic recording apparatus 230. In the recording operation, the magnetic head 130 is used to record information in the magnetic recording medium 80.

[0108] AsFigure 13 As shown, the magnetic head 130 includes magnetic poles 30, a shield 30S, and a laminate 20. In this example, the shield 30S includes a first shield 31. The shield 30S may also include a second shield 32.

[0109] like Figure 12 As shown, the laminate 20 includes a first magnetic layer 21, a first non-magnetic layer 41, and a second non-magnetic layer 42. The first non-magnetic layer 41 is disposed between the magnetic pole 30 and the first magnetic layer 21. The first non-magnetic layer 41 includes one of a first material and a second material. The first material contains at least one selected from Cu, Au, Cr, V, Al, and Ag. The second material contains at least one selected from Ru, Ir, Ta, Rh, Pd, Pt, and W. The second non-magnetic layer 42 is disposed between the first magnetic layer 21 and a shield 30S (e.g., the first shield 31). The second non-magnetic layer 42 includes the other of the first material and the second material.

[0110] like Figure 13 As shown, a first current I1 (e.g., a direct current) is supplied to the laminate 20 from the first current circuit 20D. An electron flow accompanying the first current I1 acts on the laminate 20. The direction of the electron flow is opposite to the direction of the first current I1. By flowing the first current I1 into the laminate 20, an alternating magnetic field is generated in the laminate 20.

[0111] In this embodiment, at least one of the magnetic poles 30 and the shielding element 30S resonates with the laminate 20. For example, at least one of the magnetic poles 30 and the shielding element 30S oscillates in sync with the oscillation of the laminate 20. Consequently, an alternating magnetic field is also generated from at least one of the magnetic poles 30 and the shielding element 30S. This alternating magnetic field generated from at least one of the magnetic poles 30 and the shielding element 30S is also applied to the magnetic recording medium 80. MAMR can be implemented. Furthermore, the alternating magnetic field generated from the laminate 20 can be utilized, enabling a more efficient MAMR.

[0112] For example, the intensity of the alternating magnetic field generated from at least either the magnetic pole 30 or the shield 30S is higher than the intensity of the alternating magnetic field generated from the laminate 20. At least either the magnetic pole 30 or the shield 30S, for example, has the function of amplifying the alternating magnetic field generated from the laminate 20.

[0113] The magnetic head 130 provides a magnetic head and magnetic recording device that can increase recording density.

[0114] like Figure 12 As shown, the laminate 20 can also retract with respect to the dielectric-facing surface 30F of the magnetic pole 30. An alternating magnetic field is concentrated near the dielectric-facing surface 30F of the magnetic pole 30. This enables more efficient MAMR (Magnetic Dynamic Range) operations.

[0115] Figure 14 This is a schematic cross-sectional view illustrating the magnetic head according to the third embodiment.

[0116] like Figure 14 As shown, in the magnetic head 131 according to the embodiment, the shielding member 30S includes a first shielding member 31 and a second shielding member 32. A laminate 20 is provided between the magnetic pole 30 and the first shielding member 31. Another laminate 20a is provided between the magnetic pole 30 and the second shielding member 32. The structure of the laminate 20a can be the same as the structure of the laminate 20. For example, the laminate 20a includes a magnetic layer 21A, a non-magnetic layer 41A, and a non-magnetic layer 42A.

[0117] The first current I1 flows, for example, from the second shield 32 to the first shield 31 via the magnetic pole 30. In this case, the first non-magnetic layer 41 and the non-magnetic layer 42A contain the first material described above (at least one selected from Cu, Au, Cr, V, Al, and Ag). The second non-magnetic layer 42 and the non-magnetic layer 41A contain the second material described above (at least one selected from Ru, Ir, Ta, Rh, Pd, Pt, and W).

[0118] The first current I1 can also flow from the first shield 31 to the second shield 32 via the magnetic pole 30. In this case, the second non-magnetic layer 42 and the non-magnetic layer 41A contain the first material described above. The first non-magnetic layer 41 and the non-magnetic layer 42A contain the second material described above.

[0119] Alternatively, a portion of the first current I1 may flow from the magnetic pole 30 to the first shield 31, and another portion of the first current I1 may flow from the magnetic pole 30 to the second shield 32. In this case, the first non-magnetic layer 41 and the non-magnetic layer 41A contain the first material described above. The second non-magnetic layer 42 and the non-magnetic layer 42A contain the second material described above.

[0120] Alternatively, a portion of the first current I1 may flow from the first shield 31 to the magnetic pole 30, and another portion of the first current I1 may flow from the second shield 32 to the magnetic pole 30. In this case, the second non-magnetic layer 42 and the non-magnetic layer 42A contain the first material described above. The first non-magnetic layer 41 and the non-magnetic layer 41A contain the second material described above.

[0121] like Figure 14 As shown, the laminates 20 and 20a can also be retracted with reference to the dielectric-opposing surface 30F of the magnetic pole 30.

[0122] Figure 15 This is a schematic cross-sectional view illustrating the magnetic head according to the third embodiment.

[0123] like Figure 15As shown in the embodiment, in the magnetic head 132, the first side shield 35a and the second side shield 35b are provided as the shield 30S. The laminate 20b is provided between the pole 30 and the first side shield 35a. The laminate 20c is provided between the pole 30 and the second side shield 35b. The laminates 20b and 20c can have the same structure as the laminate 20. For example, the laminate 20b includes the magnetic layer 21B, the non-magnetic layer 41B, and the non-magnetic layer 42B. For example, the laminate 20c includes the magnetic layer 21C, the non-magnetic layer 41C, and the non-magnetic layer 42C.

[0124] The first current I1 flows from the first side shield 35a to the second side shield 35b via the pole 30, for example. In this case, the non-magnetic layer 42B and the non-magnetic layer 41C contain the first material described above (at least one selected from Cu, Au, Cr, V, Al, and Ag). The non-magnetic layer 41B and the non-magnetic layer 42C contain the second material described above (at least one selected from Ru, Ir, Ta, Rh, Pd, Pt, and W).

[0125] The first current I1 can also flow from the second side shield 35b to the first side shield 35a via the pole 30, for example. In this case, the non-magnetic layer 41B and the non-magnetic layer 42C contain the first material described above. The non-magnetic layer 42B and the non-magnetic layer 41C contain the second material described above.

[0126] Alternatively, a part of the first current I1 flows from the pole 30 to the first side shield 35a, and another part of the first current I1 flows from the pole 30 to the second side shield 35b, for example. In this case, the non-magnetic layer 41B and the non-magnetic layer 41C contain the first material described above. The non-magnetic layer 42B and the non-magnetic layer 42C contain the second material described above.

[0127] Alternatively, a part of the first current I1 flows from the first side shield 35a to the pole 30, and another part of the first current I1 flows from the second side shield 35b to the pole 30, for example. In this case, the non-magnetic layer 42B and the non-magnetic layer 42C contain the first material described above. The non-magnetic layer 41B and the non-magnetic layer 41C contain the second material described above.

[0128] As shown in the embodiment, the laminates 20b and 20c can also be retracted with reference to the medium facing surface 30F of the pole 30. Figure 15

[0129] Figure 16 is a schematic cross-sectional view illustrating a magnetic head according to a third embodiment.

[0130] As shown in the embodiment, the laminates 20b and 20c can also be retracted with reference to the medium facing surface 30F of the pole 30. Figure 16 ​As shown, the magnetic head 133 according to the embodiment includes magnetic poles 30, a first shield 31, and a first side shield 35a. Other than those described above, the structure in the magnetic head 133 may be the same as that in the magnetic head 130.

[0131] In the magnetic head 133, the first shield 31 is one of a trailing shield and a guiding shield. The direction from the magnetic pole 30 to the first shield 35a (e.g., along the Y-axis) intersects the direction from the magnetic pole 30 to the first shield 31 (e.g., along the X-axis).

[0132] The laminate 20 is disposed between the first shielding member 31 and the first side shielding member 35a. The laminate 20 includes a first magnetic layer 21, a first non-magnetic layer 41, and a second non-magnetic layer 42. The first non-magnetic layer 41 is disposed between the first magnetic layer 21 and the first shielding member 31. The first non-magnetic layer 41 contains at least one selected from Cu, Au, Cr, V, Al, and Ag. The second non-magnetic layer 42 is disposed between the first magnetic layer 21 and the first side shielding member 35a. The second non-magnetic layer 42 contains at least one selected from Ru, Ir, Ta, Rh, Pd, Pt, and W.

[0133] For example, a first current I1 flows from the first shield 31 to the first side shield 35a. For example, an alternating magnetic field is generated from the laminate 20 through the first current I1. At least any one of the first shield 31, the first side shield 35a, and the magnetic pole 30 resonates with the laminate 20.

[0134] like Figure 16 As shown, the magnetic head 133 may also include a second shield 32 and a second side shield 35b. Other laminates 20a are disposed between the first shield 31 and the second side shield 35b. Other laminates 20b are disposed between the second shield 32 and the first side shield 35a. Other laminates 20c are disposed between the second shield 32 and the second side shield 35b.

[0135] An alternating magnetic field is generated in the stacked bodies 20a, 20b, and 20c. At least one of the first shield 31, the second shield 32, the first side shield 35a, and the second side shield 35b resonates with the stacked bodies 20a, 20b, and 20c. This enables a more effective MAMR.

[0136] Figure 17 This is a schematic cross-sectional view illustrating the magnetic head according to the third embodiment.

[0137] like Figure 17As shown, the magnetic head 134 according to the embodiment includes the pole 30 and the laminate 20. In the magnetic head 134, the structure of the laminate 20 is different from that in the magnetic head 130. The structure of the magnetic head 134 other than the above can be the same as that of the magnetic head 130, for example.

[0138] In the magnetic head 134, the pole 30 includes a first partial region 30p and a second partial region 30q. The laminate 20 is provided between the first partial region 30p and the second partial region 30q. The laminate 20 includes the first magnetic layer 21, a first non-magnetic layer 41, and a second non-magnetic layer 42. The first non-magnetic layer 41 is provided between the first partial region 30p and the first magnetic layer 21. The pole 30 includes a medium facing surface 30F, for example. The first partial region 30p is located between the medium facing surface 30F and the second partial region 30q. The non-magnetic layer 50 can be in contact with the first partial region 30p and the second partial region 30q. The first non-magnetic layer 41 contains one of the first material and the second material. The second non-magnetic layer 42 contains the other of the first material and the second material. The first material contains at least one selected from Cu, Au, Cr, V, Al, and Ag. The second material contains at least one selected from Ru, Ir, Ta, Rh, Pd, Pt, and W.

[0139] The first current II is supplied to the laminate 20, for example. The alternating magnetic field is generated from the laminate 20. In the embodiment, at least a part of the pole 30 resonates with the laminate 20. The alternating magnetic field is generated from the pole 30, for example. More effective MAMR can be implemented.

[0140] The first current II has a direction from the first partial region 30p to the second partial region 30q, for example. In this case, the first non-magnetic layer 41 contains the first material (at least one selected from Cu, Au, Cr, V, Al, and Ag). The second non-magnetic layer 42 contains the second material (at least one selected from Ru, Ir, Ta, Rh, Pd, Pt, and W).

[0141] The first current II can also have a direction from the second partial region 30q to the first partial region 30p, for example. In this case, the first non-magnetic layer 41 contains the second material, and the second non-magnetic layer 42 contains the first material.

[0142] Hereinafter, examples of the magnetic head and the magnetic recording apparatus according to the embodiment will be described.

[0143] Figure 18 is a schematic perspective view illustrating the magnetic recording apparatus according to the embodiment.

[0144] As Figure 18As shown, the magnetic head (e.g., magnetic head 110) involved in the embodiment is used together with the magnetic recording medium 80. In this example, the magnetic head 110 includes a recording section 60 and a playback section 70. Information is recorded on the magnetic recording medium 80 through the recording section 60 of the magnetic head 110. The information recorded on the magnetic recording medium 80 is reproduced through the playback section 70.

[0145] The magnetic recording medium 80 includes, for example, a medium substrate 82 and a magnetic recording layer 81 disposed on the medium substrate 82. The magnetization 83 of the magnetic recording layer 81 is controlled by the recording unit 60.

[0146] The reproduction unit 70 includes, for example, a first reproduction magnetic shield 72a, a second reproduction magnetic shield 72b, and a magnetic reproduction element 71. The magnetic reproduction element 71 is disposed between the first reproduction magnetic shield 72a and the second reproduction magnetic shield 72b. The magnetic reproduction element 71 is capable of outputting a signal corresponding to the magnetization 83 of the magnetic recording layer 81.

[0147] like Figure 18 As shown, the magnetic recording medium 80 moves relative to the magnetic head 110 in the medium movement direction 85. At any position, the information corresponding to the magnetization 83 of the magnetic recording layer 81 is controlled by the magnetic head 110. At any position, the information corresponding to the magnetization 83 of the magnetic recording layer 81 is reproduced by the magnetic head 110.

[0148] Figure 19 This is a schematic perspective view illustrating a portion of the magnetic recording apparatus according to an exemplary embodiment.

[0149] Figure 19 An example of a head slider is shown.

[0150] The magnetic head 110 is disposed on the head slider 159. The head slider 159 may contain, for example, Al2O3 / TiC. The head slider 159 moves relative to the magnetic recording medium while suspending on or in contact with the magnetic recording medium.

[0151] The head slider 159 has, for example, an air inlet side 159A and an air outlet side 159B. The magnetic head 110 is disposed on the side of the air outlet side 159B of the head slider 159. Thus, the magnetic head 110 moves relative to the magnetic recording medium while suspending on or in contact with the magnetic recording medium.

[0152] Figure 20 This is a schematic perspective view illustrating the magnetic recording apparatus according to an exemplary embodiment.

[0153] Figure 21 (a) and Figure 21 (b) is a schematic perspective view illustrating a portion of the magnetic recording apparatus according to an exemplary embodiment.

[0154] As Figure 20 indicated, in the magnetic recording device 150 related to the embodiment, a rotary actuator is used. A recording medium disk 180 is mounted to a spindle motor 180M. The recording medium disk 180 is rotated by the spindle motor 180M in the direction of the arrow AR. The spindle motor 180M responds to a control signal from a drive device control section. The magnetic recording device 150 related to the embodiment can also be provided with a plurality of recording medium disks 180. The magnetic recording device 150 can also include a recording medium 181. The recording medium 181 is, for example, an SSD (Solid State Drive). The recording medium 181 uses, for example, a nonvolatile memory such as a flash memory. The magnetic recording device 150 can also be a hybrid HDD (Hard Disk Drive), for example.

[0155] A head slider 159 performs recording and reproduction of information recorded to the recording medium disk 180. The head slider 159 is provided at the front end of a thin film-like suspension 154. A magnetic head related to the embodiment is provided near the front end of the head slider 159.

[0156] When the recording medium disk 180 is rotated, the pressing pressure generated by the suspension 154 is balanced with the pressure generated at the medium opposing surface (ABS) of the head slider 159. The distance between the medium opposing surface of the head slider 159 and the surface of the recording medium disk 180 becomes a predetermined flying height. In the embodiment, the head slider 159 can also be in contact with the recording medium disk 180. A contact running type can also be applied, for example.

[0157] The suspension 154 is connected to one end of an arm 155 (for example, an actuator arm). The arm 155 has, for example, a bobbin portion and the like. The bobbin portion holds a drive coil. A voice coil motor 156 is provided at the other end of the arm 155. The voice coil motor 156 is one type of linear motor. The voice coil motor 156 includes, for example, a drive coil and a magnetic circuit. The drive coil is wound around the bobbin portion of the arm 155. The magnetic circuit includes a permanent magnet and a counter yoke. The drive coil is provided between the permanent magnet and the counter yoke. The suspension 154 has one end and the other end. A magnetic head is provided at one end of the suspension 154. The arm 155 is connected to the other end of the suspension 154.

[0158] The arm 155 is held by a ball bearing. The ball bearing is provided at two portions, upper and lower, of a bearing portion 157. The arm 155 is capable of rotation and sliding by the voice coil motor 156. The magnetic head is capable of moving to an arbitrary position of the recording medium disk 180.

[0159] Figure 21 (a) of FIG. 1 illustrates a part of the structure of the magnetic recording device, which is an enlarged perspective view of the head stack assembly 160.

[0160] Figure 21 (b) is a perspective view illustrating a head assembly (head gimbal assembly: HGA) 158 that becomes a part of the head stack assembly 160.

[0161] As shown in (a) of FIG. 1, the head stack assembly 160 includes a bearing portion 157, a head gimbal assembly 158, and a support frame 161. The head gimbal assembly 158 extends from the bearing portion 157. The support frame 161 extends from the bearing portion 157. The support frame 161 extends in a direction opposite to the extending direction of the head gimbal assembly 158. The support frame 161 supports a coil 162 of the voice coil motor 156. Figure 21 As shown in (b) of FIG. 1, the head gimbal assembly 158 has an arm 155 extending from the bearing portion 157 and a suspension 154 extending from the arm 155.

[0162] Figure 21 As shown in (b) of FIG. 1, the head gimbal assembly 158 has an arm 155 extending from the bearing portion 157 and a suspension 154 extending from the arm 155.

[0163] A head slider 159 is provided at a front end of the suspension 154. The head slider 159 is provided with the magnetic head to which the embodiment is directed.

[0164] The head assembly (head gimbal assembly) 158 to which the embodiment is directed includes the magnetic head to which the embodiment is directed, the head slider 159 provided with the magnetic head, the suspension 154, and the arm 155. The head slider 159 is provided at one end of the suspension 154. The arm 155 is connected to the other end of the suspension 154.

[0165] The suspension 154 has, for example, a lead wire (not shown) for recording and reproducing a signal. The suspension 154 can also have, for example, a lead wire (not shown) for a heater for adjusting a floating amount. The suspension 154 can also have, for example, a lead wire (not shown) for a spin transfer torque oscillator, etc. These lead wires are electrically connected to a plurality of electrodes provided in the magnetic head.

[0166] A signal processing portion 190 is provided in the magnetic recording apparatus 150. The signal processing portion 190 performs recording and reproducing of a signal to / from the magnetic recording medium using the magnetic head. The input / output line of the signal processing portion 190 is connected to, for example, an electrode pad of the head gimbal assembly 158, and is electrically connected to the magnetic head.

[0167] The magnetic recording apparatus 150 to which the embodiment is directed includes a magnetic recording medium, a magnetic head to which the embodiment is directed, a movable portion, a position control portion, and a signal processing portion. The movable portion moves the magnetic recording medium and the magnetic head relatively in a state where they are separated or in a state where they are in contact. The position control portion aligns the magnetic head with a predetermined recording position of the magnetic recording medium. The signal processing portion performs recording and reproducing of a signal to / from the magnetic recording medium using the magnetic head.

[0168] ​For example, a recording medium disk 180 is used as the magnetic recording medium. The movable part includes, for example, a head slider 159. The position control part includes, for example, a head gimbal assembly 158.

[0169] Embodiments can also include the following technical solutions.

[0170] (Technical Solution 1)

[0171] A magnetic head comprising:

[0172] a magnetic pole;

[0173] a shield; and

[0174] a non-magnetic layer provided between the magnetic pole and the shield, the non-magnetic layer being in contact with the magnetic pole and the shield, the non-magnetic layer containing at least one first element selected from Cu, Au, Cr, V, Al, and Ag.

[0175] (Technical Solution 2)

[0176] The magnetic head according to Technical Solution 1,

[0177] a thickness of the non-magnetic layer in a direction from the magnetic pole toward the shield is 2 nm or more and 50 nm or less.

[0178] (Technical Solution 3)

[0179] The magnetic head according to Technical Solution 1 or 2,

[0180] the shield is one of a trailing shield and a leading shield.

[0181] (Technical Solution 4)

[0182] The magnetic head according to Technical Solution 1 or 2,

[0183] the shield includes a trailing shield and a leading shield,

[0184] the non-magnetic layer includes a first non-magnetic layer and a second non-magnetic layer,

[0185] the first non-magnetic layer is provided between the magnetic pole and the trailing shield, the first non-magnetic layer being in contact with the magnetic pole and the trailing shield, the first non-magnetic layer containing at least one first element selected from Cu, Au, Cr, V, Al, and Ag,

[0186] the second non-magnetic layer is provided between the magnetic pole and the leading shield, the second non-magnetic layer being in contact with the magnetic pole and the leading shield, the second non-magnetic layer containing at least one first element selected from Cu, Au, Cr, V, Al, and Ag.

[0187] (claim 5)

[0188] The magnetic head according to claim 1 or 2,

[0189] The shield is one of a first side shield and a second side shield.

[0190] (claim 6)

[0191] The magnetic head according to claim 1 or 2,

[0192] The shield includes a first side shield and a second side shield,

[0193] The non-magnetic layer includes a first non-magnetic layer and a second non-magnetic layer,

[0194] The first non-magnetic layer is disposed between the pole and the first side shield, and is in contact with the pole and the first side shield, the first non-magnetic layer containing at least one selected from Cu, Au, Cr, V, Al, and Ag,

[0195] The second non-magnetic layer is disposed between the pole and the second side shield, and is in contact with the pole and the first side shield, the second non-magnetic layer containing at least one selected from Cu, Au, Cr, V, Al, and Ag.

[0196] (claim 7)

[0197] The magnetic head according to any one of claims 1 to 6,

[0198] The pole includes a medium facing surface,

[0199] The non-magnetic layer is recessed with reference to the medium facing surface.

[0200] (claim 8)

[0201] A magnetic head comprising:

[0202] a pole;

[0203] a first shield that is one of a trailing shield and a leading shield;

[0204] a first side shield that intersects a direction from the pole to the first side shield with a direction from the pole to the first shield; and

[0205] a non-magnetic layer disposed between the first shield and the first side shield, the non-magnetic layer being in contact with the first shield and the first side shield, the non-magnetic layer containing at least one first element selected from Cu, Au, Cr, V, Al, and Ag.

[0206] (technical solution 9)

[0207] the magnetic head according to technical solution 8,

[0208] the non-magnetic layer has a thickness of 2 nm or more and 50 nm or less in a direction from the first shield to the first side shield.

[0209] (technical solution 10)

[0210] the magnetic head according to technical solution 8 or 9,

[0211] further comprising a second side shield,

[0212] at least a part of the magnetic pole is located between the first side shield and the second side shield,

[0213] the non-magnetic layer includes a first non-magnetic layer and a second non-magnetic layer,

[0214] the first non-magnetic layer is disposed between the first shield and the first side shield, and is in contact with the first shield and the first side shield, and the first non-magnetic layer contains at least one selected from Cu, Au, Cr, V, Al, and Ag,

[0215] the second non-magnetic layer is disposed between the first shield and the second side shield, and is in contact with the first shield and the second side shield, and the second non-magnetic layer contains at least one selected from Cu, Au, Cr, V, Al, and Ag.

[0216] (technical solution 11)

[0217] the magnetic head according to technical solution 10,

[0218] further comprising a second shield which is the other of the trailing shield and the leading shield,

[0219] the non-magnetic layer includes a third non-magnetic layer and a fourth non-magnetic layer,

[0220] the third non-magnetic layer is disposed between the second shield and the first side shield, and is in contact with the second shield and the first side shield, and the third non-magnetic layer contains at least one selected from Cu, Au, Cr, V, Al, and Ag,

[0221] the fourth non-magnetic layer is disposed between the second shield and the second side shield, and is in contact with the second shield and the second side shield, and the fourth non-magnetic layer contains at least one selected from Cu, Au, Cr, V, Al, and Ag.

[0222] (technical solution 12)

[0223] A magnetic head comprising:

[0224] a magnetic pole including a first partial region and a second partial region; and

[0225] a non-magnetic layer provided between the first partial region and the second partial region, the non-magnetic layer containing at least one first element selected from Cu, Au, Cr, V, Al, and Ag.

[0226] (technical solution 13)

[0227] The magnetic head according to technical solution 12,

[0228] the magnetic pole includes a medium facing surface,

[0229] the first partial region is located between the medium facing surface and the second partial region.

[0230] (technical solution 14)

[0231] A magnetic recording device comprising:

[0232] the magnetic head according to any one of technical solutions 1 to 13; and

[0233] a first current circuit,

[0234] the first current circuit is capable of supplying a first current between the magnetic pole and the shield,

[0235] when the first current is supplied between the magnetic pole and the shield, an alternating magnetic field is generated from at least either of the magnetic pole and the shield.

[0236] (technical solution 15)

[0237] A magnetic head comprising:

[0238] a magnetic pole; and

[0239] a conductive member electrically connected to the magnetic pole,

[0240] when an alternating current is supplied to the conductive member and the magnetic pole, an alternating magnetic field is generated from the magnetic pole.

[0241] (technical solution 16)

[0242] The magnetic head according to technical solution 15, further comprising:

[0243] a magnetic pole terminal electrically connected to the magnetic pole; and

[0244] A terminal electrically connected to the conductive member.

[0245] (Embodiment 17)

[0246] A magnetic recording device including:

[0247] the magnetic head according to Embodiment 15 or 16; and

[0248] an alternating current circuit,

[0249] the alternating current circuit is capable of supplying the alternating current to the magnetic pole and the conductive member,

[0250] an alternating magnetic field is generated from the magnetic pole when the alternating current is supplied to the magnetic pole and the conductive member.

[0251] (Embodiment 18)

[0252] A magnetic head including:

[0253] a magnetic pole;

[0254] a shield; and

[0255] a laminate provided between the magnetic pole and the shield,

[0256] the laminate includes:

[0257] a first magnetic layer;

[0258] a first non-magnetic layer provided between the magnetic pole and the first magnetic layer, the first non-magnetic layer containing one of a first material and a second material, the first material containing at least one selected from Cu, Au, Cr, V, Al, and Ag, and the second material containing at least one selected from Ru, Ir, Ta, Rh, Pd, Pt, and W; and

[0259] a second non-magnetic layer provided between the first magnetic layer and the shield, the second non-magnetic layer containing the other of the first material and the second material,

[0260] at least either one of the magnetic pole and the shield resonates with the laminate.

[0261] (Embodiment 19)

[0262] A magnetic head including:

[0263] a magnetic pole;

[0264] a first shield which is one of a trailing shield and a leading shield;

[0265] a first side shield, a direction from the magnetic pole to the first side shield crossing a direction from the magnetic pole to the first shield; and

[0266] a laminate provided between the first shield and the first side shield,

[0267] the laminate has:

[0268] a first magnetic layer;

[0269] a first non-magnetic layer provided between the first magnetic layer and the first shield, the first non-magnetic layer containing one of a first material containing at least one selected from Cu, Au, Cr, V, Al, and Ag, and a second material containing at least one selected from Ru, Ir, Ta, Rh, Pd, Pt, and W; and

[0270] a second non-magnetic layer provided between the first magnetic layer and the first side shield, the second non-magnetic layer containing the other of the first material and the second material,

[0271] at least either one of the first shield and the first side shield resonates with the laminate.

[0272] (Technical Solution 20)

[0273] a magnetic head having:

[0274] a magnetic pole including a first partial region and a second partial region; and

[0275] a laminate provided between the first partial region and the second partial region,

[0276] the laminate has:

[0277] a first magnetic layer;

[0278] a first non-magnetic layer provided between the first partial region and the first magnetic layer, the first non-magnetic layer containing one of a first material containing at least one selected from Cu, Au, Cr, V, Al, and Ag, and a second material containing at least one selected from Ru, Ir, Ta, Rh, Pd, Pt, and W; and

[0279] a second non-magnetic layer provided between the first magnetic layer and the second partial region, the second non-magnetic layer containing the other of the first material and the second material,

[0280] at least a part of the magnetic pole resonates with the laminate.

[0281] According to the embodiments, a magnetic head and a magnetic recording device capable of improving recording density can be provided.

[0282] In the present application specification, "perpendicular" and "parallel" are not only strict perpendicular and strict parallel, but also include, for example, a deviation in a manufacturing process, and the like, and can be substantially perpendicular and substantially parallel.

[0283] The embodiments of the present application have been described above with reference to specific examples. However, the present application is not limited to these specific examples. For example, as to the specific structure of each element of the magnetic pole, the laminate, the magnetic layer, the non-magnetic layer, and the conductive member, and the like included in the magnetic head, as long as the present application can be implemented by a person skilled in the art appropriately selecting from a known range to obtain the same effects, it is included in the scope of the present application.

[0284] A technical solution obtained by combining any two or more elements in the specific examples within a technically feasible range, as long as it includes the gist of the present application, is also included in the scope of the present application.

[0285] Furthermore, all the magnetic heads and the magnetic recording devices that a person skilled in the art can implement by appropriately making design changes based on the magnetic heads and the magnetic recording devices described above as the embodiments of the present application, as long as they include the gist of the present application, are also within the scope of the present application.

[0286] Furthermore, it is understood that various modifications and changes can be made by a person skilled in the art within the scope of the idea of the present application, and those modifications and changes are also within the scope of the present application.

[0287] The several embodiments of the present application have been described above, but these embodiments are presented as examples, and are not intended to limit the scope of the application. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made within the scope of the gist of the present application. These embodiments and / or modifications thereof are included in the scope, the gist of the present application, and are included in the scope of the application recited in the claims and the equivalent thereof.

Claims

1. A magnetic head, comprising: magnetic pole; The first shielding element is one of the trailing shielding element and the guiding shielding element; The second shielding element is the other of the trailing shielding element and the guiding shielding element; The first side shielding member has a direction from the magnetic pole toward the first side shielding member that intersects with the direction from the magnetic pole toward the first shielding member; The second side shielding member, wherein at least a portion of the magnetic pole is located between the first side shielding member and the second side shielding member; as well as Non-magnetic layer, The non-magnetic layer includes a first non-magnetic layer, a second non-magnetic layer, a third non-magnetic layer, and a fourth non-magnetic layer. The first non-magnetic layer is disposed between the first shielding member and the first side shielding member, and is in contact with both the first shielding member and the first side shielding member. The first non-magnetic layer contains at least one selected from Cu, Au, Cr, V, Al, and Ag. The second non-magnetic layer is disposed between the first shielding member and the second side shielding member, and is in contact with both the first shielding member and the second side shielding member. The second non-magnetic layer contains at least one selected from Cu, Au, Cr, V, Al, and Ag. The third non-magnetic layer is disposed between the second shielding member and the first side shielding member, and is in contact with both the second shielding member and the first side shielding member. The third non-magnetic layer contains at least one selected from Cu, Au, Cr, V, Al, and Ag. The fourth non-magnetic layer is disposed between the second shield and the second side shield, and is in contact with the second shield and the second side shield. The fourth non-magnetic layer contains at least one selected from Cu, Au, Cr, V, Al and Ag.

2. The magnetic head according to claim 1, The thickness of the non-magnetic layer along the direction from the first shield to the first side shield is more than 2 nm and less than 50 nm.

3. A magnetic head, comprising: magnetic pole; Shielding components; and A non-magnetic layer is disposed between the magnetic pole and the shielding member, the non-magnetic layer being in contact with both the magnetic pole and the shielding member, and the non-magnetic layer containing at least one first element selected from Cu, Au, Cr, V, Al, and Ag. The shielding component includes a trailing shielding component and a guiding shielding component. The non-magnetic layer includes a first non-magnetic layer and a second non-magnetic layer. The first non-magnetic layer is disposed between the magnetic pole and the trailing shield, and is in contact with both the magnetic pole and the trailing shield. The first non-magnetic layer contains at least one selected from Cu, Au, Cr, V, Al, and Ag. The second non-magnetic layer is disposed between the magnetic pole and the guiding shield, and is in contact with both the magnetic pole and the guiding shield. The second non-magnetic layer contains at least one selected from Cu, Au, Cr, V, Al, and Ag. The magnetic poles include dielectric opposing surfaces. The first non-magnetic layer and the second non-magnetic layer recede with respect to the opposite surface of the medium.

4. A magnetic head, comprising: Magnetic poles, comprising a first region and a second region; A non-magnetic layer is disposed between the first portion region and the second portion region, the non-magnetic layer comprising at least one first element selected from Cu, Au, Cr, V, Al and Ag; Second shielding component; and A second non-magnetic layer is disposed between the first portion region and the second shielding member. The direction from the first part of the region to the second part of the region intersects with the direction from the first part of the region to the second shielding element. The magnetic poles include dielectric opposing surfaces. The first region is located between the opposite surface of the medium and the second region.

5. A magnetic recording device, comprising: The magnetic head according to claim 1 or 2; and First current circuit, The first current circuit is capable of supplying a first current to the laminated portion including the first shield, the first non-magnetic layer, and the first side shield. The first current circuit is capable of supplying a first current to the laminated portion including the first shield, the second non-magnetic layer, and the second side shield. The first current circuit is capable of supplying a first current to the laminated portion including the second shield, the third non-magnetic layer, and the first side shield. The first current circuit is capable of supplying a first current to the laminated portion including the second shield, the fourth non-magnetic layer, and the second side shield. When the first current is supplied, an alternating magnetic field is generated from at least one of the first shield, the first side shield, the second shield, and the second side shield.

6. A magnetic head, comprising: magnetic pole; The first shielding element is one of the trailing shielding element and the guiding shielding element; The second shielding element is the other of the trailing shielding element and the guiding shielding element; The first side shielding member has a direction from the magnetic pole toward the first side shielding member that intersects with the direction from the magnetic pole toward the first shielding member; The second side shielding member, wherein at least a portion of the magnetic pole is located between the first side shielding member and the second side shielding member; as well as A laminated body is disposed between the first shielding member and the first side shielding member, between the first shielding member and the second side shielding member, between the second shielding member and the first side shielding member, and between the second shielding member and the second side shielding member. The laminated body comprises: First magnetic layer; A first non-magnetic layer is disposed between the first shield, the second shield, the first side shield, and the second side shield and the first magnetic layer. The first non-magnetic layer comprises one of a first material and a second material. The first material comprises at least one selected from Cu, Au, Cr, V, Al, and Ag. The second material comprises at least one selected from Ru, Ir, Ta, Rh, Pd, Pt, and W. A second non-magnetic layer is disposed between the first magnetic layer and any one of the first shielding member, the second shielding member, the first side shielding member, and the second side shielding member, wherein the second non-magnetic layer comprises the other of the first material and the second material. At least one of the first shielding element, the second shielding element, the first side shielding element, and the second side shielding element resonates with the laminate.

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