Magnetic head and magnetic recording device

Abstract

To provide a magnetic head and a magnetic recording device capable of improving characteristics.SOLUTION: According to an embodiment, a magnetic head includes first and second magnetic poles and a magnetic element. The first magnetic pole includes a medium-facing surface and a first surface. The second magnetic pole includes a second surface. The magnetic element includes a first magnetic layer and a second magnetic layer. The first surface includes a first portion and a second portion. A second direction intersects the medium-facing surface and intersects a first direction. The first portion and the second portion fulfill one of a first condition and a second condition. Under the first condition, the position of the first portion in the second direction is positioned between the medium-facing surface position of the medium-facing surface in the second direction and the second portion position of the second portion in the second direction. Under the second condition, the second portion position is positioned between the medium-facing surface position and the first portion position. The distance along the first direction between the first portion and the second surface is shorter than the distance along the first direction between the second portion and the second surface.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] FIELD An embodiment of the present invention relates to a magnetic head and a magnetic recording device. [Background technology]

[0002] 2. Description of the Related Art Magnetic heads are used to record information on magnetic recording media such as HDDs (Hard Disk Drives), and improvements in the characteristics of magnetic heads are desired. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-4468 Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments of the present invention provide a magnetic head and a magnetic recording device that can improve characteristics. [Means for solving the problem]

[0005] According to an embodiment, the magnetic head includes a first magnetic pole, a second magnetic pole, and a magnetic element. The first magnetic pole includes a medium facing surface and a first surface intersecting the medium facing surface. The second magnetic pole includes a second surface. The first surface faces the second surface in a first direction. The magnetic element is provided between the first surface and the second surface. The magnetic element includes a first magnetic layer and a second magnetic layer provided between the first magnetic layer and the second magnetic pole. The first surface includes a first portion and a second portion. The second direction intersects the medium facing surface and intersects the first direction. The first portion and the second portion satisfy one of a first condition and a second condition. In the first condition, a first portion position of the first portion in the second direction is between a medium facing surface position of the medium facing surface in the second direction and a second portion position of the second portion in the second direction. Under the second condition, the second portion position is between the medium facing surface position and the first portion position, and a first distance along the first direction between the first portion and the second surface is shorter than a second distance along the first direction between the second portion and the second surface. [Brief explanation of the drawings]

[0006] [Figure 1] 1A and 1B are schematic cross-sectional views illustrating the magnetic head according to the first embodiment. [Figure 2] FIG. 2 is a schematic plan view illustrating the magnetic head according to the first embodiment. [Figure 3] FIG. 3 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 4] FIG. 4 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 5] FIG. 5 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 6] FIG. 6 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 7] FIG. 7 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 8]FIG. 8 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 9] FIG. 9 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 10] FIG. 10 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 11] FIG. 11 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 12] FIG. 12 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 13] FIG. 13 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 14] FIG. 14 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 15] FIG. 15 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 16] 16A and 16B are schematic views illustrating the magnetic head according to the first embodiment. [Figure 17] 17A and 17B are schematic views illustrating the magnetic head according to the first embodiment. [Figure 18] 18A and 18B are schematic views illustrating the magnetic head according to the second embodiment. [Figure 19] FIG. 19 is a schematic plan view illustrating the magnetic head according to the second embodiment. [Figure 20] FIG. 20 is a schematic plan view illustrating the magnetic head according to the second embodiment. [Figure 21] FIG. 21 is a schematic plan view illustrating the magnetic head according to the second embodiment. [Figure 22] FIG. 22 is a schematic plan view illustrating the magnetic head according to the second embodiment. [Figure 23] FIG. 23 is a schematic plan view illustrating the magnetic head according to the second embodiment. [Figure 24]FIG. 24 is a schematic perspective view illustrating the magnetic recording device according to the embodiment. [Figure 25] FIG. 25 is a schematic perspective view illustrating a part of the magnetic recording device according to the embodiment. [Figure 26] FIG. 26 is a schematic perspective view illustrating the magnetic recording device according to the embodiment. [Figure 27] 27A and 27B are schematic perspective views illustrating a part of the magnetic recording device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0007] (First embodiment) 1A and 1B are schematic cross-sectional views illustrating the magnetic head according to the first embodiment. FIG. 2 is a schematic plan view illustrating the magnetic head according to the first embodiment. FIG. 3 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 1(a), 1(b) and 3 are cross-sectional views taken along the line A1-A2 in FIG.

[0008] 1(a) and 1(b), the magnetic head 110 according to the embodiment includes a first magnetic pole 31, a second magnetic pole 32, and a magnetic element 20. The magnetic head 110 includes a recording section 60. The first magnetic pole 31, the second magnetic pole 32, and the magnetic element 20 are included in the recording section 60. As will be described later, the magnetic head 110 may also include a reproducing section.

[0009] The first magnetic pole 31 includes a medium facing surface 30F and a first surface 31f. The first surface 31f intersects with the medium facing surface 30F. Figure 2 corresponds to a plan view of the medium facing surface 30F.

[0010] The medium facing surface 30F is, for example, perpendicular to the Z-axis direction. One direction perpendicular to the Z-axis direction is the X-axis direction. The direction perpendicular to the Z-axis direction and the X-axis direction is the Y-axis direction.

[0011] The medium facing surface 30F faces the magnetic recording medium 80. The medium facing surface 30F corresponds to, for example, the ABS (Air Bearing Surface). The Z-axis direction corresponds to, for example, the height direction. The X-axis direction corresponds to, for example, the down-track direction. The Y-axis direction corresponds to, for example, the cross-track direction. The magnetic recording medium 80 and the magnetic head 110 move relatively along the down-track direction. A recording magnetic field generated by the magnetic head 110 is applied to a desired position on the magnetic recording medium 80. The magnetization at the desired position on the magnetic recording medium 80 is controlled to a direction according to the recording magnetic field. In this way, information is recorded on the magnetic recording medium 80.

[0012] The second magnetic pole 32 includes a second surface 32f. The first surface 31f faces the second surface 32f in a first direction D1. The first direction D1 is, for example, along the X-axis direction. The first direction D1 may be inclined with respect to the X-axis direction. The angle of inclination may be, for example, greater than 0 degrees and equal to or less than 25 degrees.

[0013] The magnetic element 20 is provided between the first surface 31f and the second surface 32f. The magnetic element 20 includes a first magnetic layer 21 and a second magnetic layer 22. The second magnetic layer 22 is provided between the first magnetic layer 21 and the second magnetic pole 32.

[0014] As shown in FIG. 1(b), the magnetic element 20 may include a first intermediate layer 21n. The first intermediate layer 21n is provided between the first magnetic layer 21 and the second magnetic layer 22. The first intermediate layer 21n is nonmagnetic. The first intermediate layer 21n is conductive. The first intermediate layer 21n includes, for example, at least one selected from the group consisting of Cu, Au, Cr, Al, V, and Ag. At least one of the first magnetic layer 21 and the second magnetic layer 22 includes at least one selected from the group consisting of Fe, Co, and Ni. These magnetic layers are, for example, ferromagnetic layers.

[0015] For example, the first magnetic pole 31 and the second magnetic pole 32 form a magnetic circuit. The first magnetic pole 31 is, for example, a main magnetic pole. The second magnetic pole 32 is, for example, a trailing shield. The first magnetic pole 31 may be the trailing shield and the second magnetic pole 32 may be the main magnetic pole.

[0016] As shown in FIG. 3, the recording section 60 of the magnetic head 110 may further include a coil 30c. In this example, a portion of the coil 30c is located between the first magnetic pole 31 and the second magnetic pole 32. In this example, a shield 33 is provided. In the X-axis direction, the first magnetic pole 31 is located between the shield 33 and the second magnetic pole 32. Another portion of the coil 30c is located between the shield 33 and the first magnetic pole 31. An insulating section 30i is provided between these multiple elements. The shield 33 is, for example, a leading shield. The magnetic head 110 may also include side shields (not shown).

[0017] 3, a recording current Iw is supplied to the coil 30c from the recording circuit 30D. For example, a first coil terminal Tc1 and a second coil terminal Tc2 are provided on the coil 30c. The recording current Iw is supplied to the coil 30c via these coil terminals. A recording magnetic field corresponding to the recording current Iw is applied to the magnetic recording medium 80 from the first magnetic pole 31.

[0018] As shown in FIG. 1B, the magnetic head 110 (recording unit 60) may include a first non-magnetic layer 41 and a second non-magnetic layer 42. The first non-magnetic layer 41 is provided between the first surface 31f and the magnetic element 20. The second non-magnetic layer 42 is provided between the magnetic element 20 and the second surface 32f. The first non-magnetic layer 41 includes at least one selected from the group consisting of, for example, Cu, Au, Cr, Al, V, Ag, Ru, Ir, Ta, Rh, Pd, Pt, and W. The second non-magnetic layer 42 includes at least one selected from the group consisting of, for example, Cu, Au, Cr, Al, V, Ag, Ru, Ir, Ta, Rh, Pd, Pt, and W. At least one of the first non-magnetic layer 41 and the second non-magnetic layer 42 may include at least one selected from the group consisting of, for example, Ru, Ir, Ta, Rh, Pd, Pt, and W.

[0019] As shown in FIG. 3, the element circuit 20D is electrically connected to the magnetic element 20. In this example, the magnetic element 20 is electrically connected to the first magnetic pole 31 and the second magnetic pole 32. A first terminal T1 and a second terminal T2 are provided on the magnetic head 110. The first terminal T1 is electrically connected to one end of the magnetic element 20 via the first wiring W1 and the first magnetic pole 31. The second terminal T2 is electrically connected to the other end of the magnetic element 20 via the second wiring W2 and the second magnetic pole 32. For example, an element current ic is supplied to the magnetic element 20 from the element circuit 20D.

[0020] 3, in one operating state, the element current ic flows from the first magnetic pole 31 to the second magnetic pole 32. In this case, the electron current je accompanying the element current ic flows from the second magnetic pole 32 to the first magnetic pole 31. The element current ic is, for example, a direct current.

[0021] As described above, a magnetic field (recording magnetic field) corresponding to the recording current Iw is generated between the first magnetic pole 31 and the second magnetic pole 32. This magnetic field is also applied to the magnetic element 20. With the magnetic field applied to the magnetic element 20, an element current i c is supplied to the magnetic element 20.

[0022] For example, when an element current i c equal to or greater than a threshold flows through the magnetic element 20, oscillation occurs in the magnetic layer included in the magnetic element 20. The magnetic element 20 functions as, for example, a spin-torque oscillator (STO). As the oscillation occurs, an alternating magnetic field (for example, a high-frequency magnetic field) is generated from the magnetic element 20. The alternating magnetic field generated by the magnetic element 20 is applied to the magnetic recording medium 80, thereby assisting recording on the magnetic recording medium 80. For example, microwave-assisted magnetic recording (MAMR) can be implemented.

[0023] The control unit 75 controls the recording circuit 30D and the element circuit 20D. The magnetic recording device 210 according to the embodiment includes a magnetic head 110 and a magnetic recording medium 80. The magnetic recording device 210 may include the recording circuit 30D, the element circuit 20D, and the control unit 75. At least a recording operation is performed in the magnetic recording device 210. In the recording operation, information is recorded on the magnetic recording medium 80 using the magnetic head 110.

[0024] 1(a), the first surface 31f includes a first portion p1 and a second portion p2. The second direction D2 intersects the medium facing surface 30F and the first direction D1. The second direction D2 may be perpendicular to the first direction D1.

[0025] The first portion p1 and the second portion p2 satisfy one of a first condition and a second condition, in which a first portion position pp1 of the first portion p1 in the second direction D2 is between a medium facing surface position ppF of the medium facing surface 30F in the second direction D2 and a second portion position pp2 of the second portion p2 in the second direction D2.

[0026] Under the second condition, the second partial position pp2 is between the medium facing surface position ppF and the first partial position pp1.

[0027] 1(a), the first portion p1 and the second portion p2 satisfy the first condition, in which the medium facing surface 30F, the first portion p1, and the second portion p2 are arranged in this order.

[0028] In the embodiment, a first distance d1 along the first direction D1 between the first portion p1 and the second surface 32f is shorter than a second distance d2 along the first direction D1 between the second portion p2 and the second surface 32f. At least a portion of the magnetic element 20 overlaps with the second portion p2 in the first direction D1. A portion of the magnetic element 20 may overlap with the first portion p1 in the first direction D1.

[0029] In this example, the first portion p1 protrudes toward the second surface 32f with respect to the second portion p2. The first portion p1 is, for example, a protruding portion. The second portion p2 is, for example, a recessed portion.

[0030] With this configuration, for example, the magnetic field generated between the first magnetic pole 31 and the second magnetic pole 32 and passing through the magnetic element 20 is made uniform. This makes the magnetization in the magnetic element 20 uniform. For example, the oscillation in the magnetic element 20 is made uniform. For example, strong oscillation intensity is obtained. For example, effective recording operation is possible. A magnetic head capable of improving characteristics can be provided.

[0031] The first portion p1 may be, for example, an end portion of the first surface 31f.

[0032] In the embodiment, the ratio of the absolute value of the difference between the second distance d2 and the first distance d1 to the second distance d2 is, for example, 0.05 or more and 0.3 or less. A ratio of 0.05 or more effectively homogenizes the magnetic field passing through the magnetic element 20. A ratio of 0.3 or less prevents the gap between the first magnetic pole 31 and the second magnetic pole 32 from becoming excessively large.

[0033] In an embodiment, the difference between the second distance d2 and the first distance d1 may be, for example, 2 nm or more.

[0034] As already described, the first magnetic pole 31 and the second magnetic pole 32 may be electrically connected to the magnetic element 20. When an element current i c flows between the first magnetic pole 31 and the second magnetic pole 32, the electrical resistance between the first magnetic pole 31 and the second magnetic pole 32 is configured to oscillate. For example, the electrical resistance varies substantially periodically. The frequency of the oscillation (the frequency of the periodic variation) is, for example, not less than 10 GHz and not more than 50 GHz.

[0035] In the embodiment, the thickness t21 (see FIG. 2) of the first magnetic layer 21 along the first direction D1 may be, for example, 3 nm or more and 15 nm or less. The thickness t22 (see FIG. 2) of the second magnetic layer 22 along the first direction D1 may be, for example, 3 nm or more and 15 nm or less. The thickness t21n (see FIG. 2) of the first intermediate layer 21n along the first direction D1 may be, for example, 1 nm or more and 4 nm or less. The thickness t41 (see FIG. 2) of the first non-magnetic layer 41 along the first direction D1 may be, for example, 1 nm or more and 8 nm or less. The thickness t42 (see FIG. 2) of the second non-magnetic layer 42 along the first direction D1 may be, for example, 1 nm or more and 8 nm or less.

[0036] As shown in FIG. 1(a), in the magnetic head 110, the second surface 32f is substantially flat.

[0037] FIG. 4 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 4, in the magnetic head 110a according to the embodiment, the shape of the first surface 31f and the shape of the second surface 32f are different from those of the magnetic head 110. Except for this, the configuration of the magnetic head 110a may be the same as the configuration of the magnetic head 110.

[0038] In the magnetic head 110a, the second surface 32f includes a first facing portion q1 and a second facing portion q2. The direction from the first portion p1 to the first facing portion q1 is along the first direction D1. The direction from the second portion p2 to the second facing portion q2 is along the first direction D1. The first facing portion q1 protrudes toward the first surface 31f with respect to the second facing portion q2.

[0039] In this configuration, the first distance d1 is shorter than the second distance d2. The magnetic field passing through the magnetic element 20 is made uniform. Strong oscillation intensity is obtained, enabling effective recording operations. Characteristics can be improved. The first facing portion q1 may be, for example, an end portion of the second surface 32f.

[0040] FIG. 5 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. As shown in FIG. 5, in the magnetic head 110b according to the embodiment, the first portion p1 protrudes toward the second surface 32f with respect to the second portion p2. The first facing portion q1 protrudes toward the first surface 31f with respect to the second facing portion q2. The remaining configuration of the magnetic head 110b may be the same as that of the magnetic head 110 or the magnetic head 110a. In the magnetic head 110b as well, the magnetic field passing through the magnetic element 20 is homogenized. Strong oscillation intensity is obtained, enabling effective recording operations. Improved characteristics are possible.

[0041] FIG. 6 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 6, in a magnetic head 110c according to this embodiment, the shape of the first surface 31f is different from that of the magnetic head 110. Except for this, the configuration of the magnetic head 110c may be the same as the configuration of the magnetic head 110.

[0042] In the magnetic head 110c, the first portion p1 and the second portion p2 satisfy the second condition. In the second condition, the second portion position pp2 is between the medium facing surface position ppF and the first portion position pp1. In the magnetic head 110c as well, the first distance d1 is shorter than the second distance d2. The magnetic field passing through the magnetic element 20 is made uniform. This allows for improved characteristics.

[0043] FIG. 7 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 7, in the magnetic head 110d according to the embodiment, the shape of the first surface 31f and the shape of the second surface 32f are different from those of the magnetic head 110c. Except for this, the configuration of the magnetic head 110c may be the same as the configuration of the magnetic head 110c.

[0044] The magnetic head 110d satisfies the second condition. The second surface 32f includes a first facing portion q1 and a second facing portion q2. The direction from the first portion p1 to the first facing portion q1 is along the first direction D1. The direction from the second portion p2 to the second facing portion q2 is along the first direction D1. The first facing portion q1 protrudes toward the first surface 31f with respect to the second facing portion q2.

[0045] In the magnetic head 110d, the first distance d1 is shorter than the second distance d2, which makes the magnetic field passing through the magnetic element 20 uniform, thereby improving the characteristics.

[0046] FIG. 8 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. As shown in FIG. 8, in the magnetic head 110e according to the embodiment, the first portion p1 protrudes toward the second surface 32f with respect to the second portion p2. The first facing portion q1 protrudes toward the first surface 31f with respect to the second facing portion q2. The remaining configuration of the magnetic head 110e may be the same as that of the magnetic head 110c or the magnetic head 110d. The magnetic field passing through the magnetic element 20 is made uniform. This allows for improved characteristics.

[0047] FIG. 9 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 9, in a magnetic head 110f according to this embodiment, the shape of a first surface 31f is different from that of the magnetic head 110. Except for this, the configuration of the magnetic head 110f may be the same as that of the magnetic head 110.

[0048] In the magnetic head 110f, the first surface 31f further includes a third portion p3. The second portion position pp2 is between the first portion position pp1 and a third portion position pp3 of the third portion p3 in the second direction D2. A third distance d3 along the first direction D1 between the third portion p3 and the second surface 32f is shorter than the second distance d2.

[0049] In the magnetic head 110f, the magnetic field passing through the magnetic element 20 is made uniform. For example, a strong oscillation intensity is obtained. For example, an effective recording operation is possible. A magnetic head with improved characteristics can be provided.

[0050] In the example of the magnetic head 110f, the third portion p3 protrudes toward the second surface 32f with respect to the second portion p2. The third portion p3 is, for example, a protrusion.

[0051] FIG. 10 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 10, in a magnetic head 110g according to this embodiment, the shape of the second surface 32f is different from that in the magnetic head 110. Except for this, the configuration of the magnetic head 110g may be the same as the configuration of the magnetic head 110.

[0052] In the magnetic head 110g, the second surface 32f includes a first opposing portion q1, a second opposing portion q2, and a third opposing portion q3. The direction from the first portion p1 to the first opposing portion q1 is along the first direction D1. The direction from the second portion p2 to the second opposing portion q2 is along the first direction D1. The direction from the third portion p3 to the third opposing portion q3 is along the first direction D1. The first opposing portion q1 protrudes toward the first surface 31f based on the second opposing portion q2. The third opposing portion q3 protrudes toward the first surface 31f based on the second opposing portion q2. The third opposing portion q3 is, for example, a protruding portion.

[0053] In the magnetic head 110g, the magnetic field passing through the magnetic element 20 is made uniform. For example, a strong oscillation intensity is obtained. For example, an effective recording operation is possible. A magnetic head with improved characteristics can be provided.

[0054] FIG. 11 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. As shown in FIG. 11, in the magnetic head 110h according to the embodiment, the first portion p1 and the third portion p3 protrude toward the second surface 32f with respect to the second portion p2. The first facing portion q1 and the third facing portion q3 protrude toward the first surface 31f with respect to the second facing portion q2. The remaining configuration of the magnetic head 110h may be the same as that of the magnetic head 110. In the magnetic head 110h, for example, the magnetic field passing through the magnetic element 20 is homogenized. For example, effective recording operation is possible. A magnetic head capable of improving characteristics can be provided.

[0055] FIG. 12 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. As shown in FIG. 12, in the magnetic head 110i according to the embodiment, at least a portion of the magnetic element 20 overlaps with the first portion p1 in the second direction D2. At least a portion of the magnetic element 20 overlaps with the first facing portion q1 in the second direction D2. The configuration of the magnetic head 110i may be otherwise the same as that of the magnetic head 110e. In the magnetic head 110e as well, the magnetic field passing through the magnetic element 20 is homogenized. For example, a strong oscillation intensity can be obtained. For example, an effective recording operation can be achieved. A magnetic head capable of improving characteristics can be provided.

[0056] 13 to 15 are schematic cross-sectional views illustrating the magnetic head according to the first embodiment. 13, the first portion p1 protrudes toward the second surface 32f with respect to the second portion p2, and the first facing portion q1 protrudes toward the first surface 31f with respect to the second facing portion q2.

[0057] 14, the first portion p1 protrudes toward the second surface 32f with respect to the second portion p2, and the first facing portion q1 protrudes toward the first surface 31f with respect to the second facing portion q2.

[0058] 15, the first portion p1 and the third portion p3 protrude toward the second surface 32f with respect to the second portion p2. The first opposing portion q1 and the third opposing portion q3 protrude toward the first surface 31f with respect to the second opposing portion q2.

[0059] In the magnetic head 110 and the magnetic heads 110a to 110l, the first surface 31f and the second surface 32f may be curved.

[0060] FIGS. 16(a), 16(b), 17(a), and 17(b) are schematic views illustrating the magnetic head according to the first embodiment. Fig. 16(b) is a schematic plan view. Fig. 16(a) is a cross-sectional view taken along line A1-A2 in Fig. 16(b). Fig. 17(a) is a cross-sectional view taken along line A3-A4 in Fig. 16(b). Fig. 17(b) is a cross-sectional view taken along line A5-A6 in Fig. 16(b). 16(b), in the magnetic head 111 according to the embodiment, the first surface 31f includes a fourth portion p4, a fifth portion p5, and a sixth portion p6. Except for this, the configuration of the magnetic head 111 may be the same as the configuration of the magnetic head 110 or the magnetic heads 110a to 110l.

[0061] The third direction D3 runs along the medium facing surface 30F and intersects with the first direction D1. The third direction D3 may be, for example, the Y-axis direction.

[0062] A fifth portion position pp5 of the fifth portion p5 in the third direction D3 is between a fourth portion position pp4 of the fourth portion p4 in the third direction D3 and a sixth portion position pp6 of the sixth portion p6 in the third direction D3. A fourth distance d4 between the fourth portion p4 and the second surface 32f along the first direction D1 is shorter than a fifth distance d5 between the fifth portion p5 and the second surface 32f along the first direction D1. A sixth distance d6 between the sixth portion p6 and the second surface 32f along the first direction D1 is shorter than the fifth distance d5.

[0063] With this configuration, the magnetic field passing through the magnetic element 20 is made uniform within the XY plane. For example, a strong oscillation intensity can be obtained. For example, an effective recording operation can be achieved. A magnetic head with improved characteristics can be provided.

[0064] In the magnetic head 111, the fifth portion p5 is set back with respect to the fourth portion p4 and the sixth portion p6.

[0065] In the magnetic head 111, the second surface 32f includes a fourth facing portion q4, a fifth facing portion q5, and a sixth facing portion q6. A fifth facing portion position pq5 of the fifth facing portion q5 in the third direction D3 is located between a fourth facing portion position pq4 of the fourth facing portion q4 in the third direction D3 and a sixth facing portion position pq6 of the sixth facing portion q6 in the third direction D3. The fifth facing portion q5 is set back with respect to the fourth facing portion q4 and the sixth facing portion q6.

[0066] In the magnetic head 111, the distance between the fourth portion p4 and the sixth portion p6 in the third direction D3 may be longer than the length of the magnetic element 20 in the third direction D3 (magnetic element length). This distance may be the same as the magnetic element length. This distance may also be shorter than the magnetic element length.

[0067] (Second embodiment) 18A and 18B are schematic views illustrating the magnetic head according to the second embodiment. Fig. 18(b) is a schematic plan view, and Fig. 18(a) is a cross-sectional view taken along line A1-A2 in Fig. 18(b). 18(b), the magnetic head 120 according to the embodiment includes a first magnetic pole 31, a second magnetic pole 32, and a magnetic element 20. In the magnetic head 120, the second direction D2 extends along the medium facing surface 30F and intersects with the first direction D1. Except for this, the configuration of the magnetic head 120 may be the same as the configuration of the magnetic head according to the first embodiment.

[0068] The magnetic head 120 includes a first magnetic pole 31, a second magnetic pole 32, and a magnetic element 20. The first magnetic pole 31 includes a medium facing surface 30F and a first surface 31f that intersects with the medium facing surface 30F. The second magnetic pole 32 includes a second surface 32f. The first surface 31f faces the second surface 32f in the first direction D1.

[0069] The magnetic element 20 is provided between the first surface 31f and the second surface 32f. The magnetic element 20 includes a first magnetic layer 21 and a second magnetic layer 22 provided between the first magnetic layer 21 and the second magnetic pole 32. The magnetic element 20 may include a first intermediate layer 21n. The first intermediate layer 21n is provided between the first magnetic layer 21 and the second magnetic layer 22.

[0070] 18(b), the first surface 31f includes a first portion p1, a second portion p2, and a third portion p3. The second direction D2 extends along the medium facing surface 30F and intersects with the first direction D1. The second direction D2 may be, for example, the Y-axis direction.

[0071] The second portion position pp2 of the second portion p2 in the second direction D2 is between the first portion position pp1 of the first portion p1 in the second direction D2 and the third portion position pp3 of the third portion p3 in the second direction D2.

[0072] A first distance d1 between the first portion p1 and the second surface 32f along the first direction D1 is shorter than a second distance d2 between the second portion p2 and the second surface 32f along the first direction D1. A third distance d3 between the third portion p3 and the second surface 32f along the first direction D1 is shorter than the second distance d2.

[0073] For example, the second portion p2 is recessed relative to the first portion p1. The second portion p2 is recessed relative to the third portion p3. The second portion p2 is, for example, a recess. The first portion p1 and the third portion p3 are, for example, protrusions.

[0074] In the magnetic head 120, at least a portion of the magnetic element 20 is located between the second portion p2 and the second surface 32f.

[0075] In the magnetic head 120, for example, the magnetic field generated between the first magnetic pole 31 and the second magnetic pole 32 and passing through the magnetic element 20 is made uniform. This makes the magnetization in the magnetic element 20 uniform. For example, the oscillation in the magnetic element 20 is made uniform. For example, strong oscillation intensity is obtained. For example, effective recording operation becomes possible. A magnetic head capable of improving characteristics can be provided.

[0076] In this example, the second surface 32f includes a first facing portion q1, a second facing portion q2, and a third facing portion q3. The direction from the first portion p1 to the first facing portion q1 is along the first direction D1. The direction from the second portion p2 to the second facing portion q2 is along the first direction D1. The direction from the third portion p3 to the third facing portion q3 is along the first direction D1. The second facing portion q2 is set back with respect to the first facing portion q1 and the third facing portion q3.

[0077] In the embodiment, the first surface 31f may be curved, and the second surface 32f may be curved.

[0078] 19 and 20 are schematic plan views illustrating the magnetic head according to the second embodiment. 19, in the magnetic head 120a according to the embodiment, the first distance d1 is shorter than the second distance d2, and the third distance d3 is shorter than the second distance d2.

[0079] 20, in the magnetic head 120b according to the embodiment, the first distance d1 is shorter than the second distance d2. The third distance d3 is also shorter than the second distance d2. In the magnetic head 120b, the portion including the second facing portion q2 may be substantially planar.

[0080] FIG. 21 is a schematic plan view illustrating the magnetic head according to the second embodiment. 21, in the magnetic head 121 according to the embodiment, the width of the magnetic element 20 in the second direction D2 is different from that in the magnetic head 120. Except for this, the configuration of the magnetic head 121 may be the same as the configuration of the magnetic head 120.

[0081] In the magnetic head 121, the magnetic element 20 does not overlap with the first portion p1 in the first direction D1, and does not overlap with the third portion p3 in the first direction D1. With this configuration, the state of the magnetic field passing through the magnetic element 20 becomes more uniform. The characteristics can be made more stable. The characteristics can be improved.

[0082] FIG. 22 is a schematic plan view illustrating the magnetic head according to the second embodiment. 22, in the magnetic head 122 according to the embodiment, the shape of the second surface 32f is different from that in the magnetic head 121. Except for this, the configuration of the magnetic head 122 may be similar to the configuration of the magnetic head 121. In the magnetic head 122, the second surface 32f is substantially flat.

[0083] FIG. 23 is a schematic plan view illustrating the magnetic head according to the second embodiment. 23, in a magnetic head 123 according to this embodiment, the shape of the first surface 31f is different from that of the magnetic head 121. Except for this, the configuration of the magnetic head 123 may be the same as the configuration of the magnetic head 121.

[0084] In the magnetic head 123, the first surface 31f further includes a fourth portion p4 and a fifth portion p5. The first portion position pp1 is located between the fourth portion position pp4 of the fourth portion p4 and the second portion position pp2 in the second direction D2. The third portion position pp3 is located between the second portion position pp2 and the fifth portion position pp5 of the fifth portion p5 in the second direction D2. The first portion p1 protrudes toward the second surface 32f based on the fourth portion p4. The third portion p3 protrudes toward the second surface 32f based on the fifth portion p5.

[0085] In the magnetic head 123, the second surface 32f includes a first facing portion q1, a second facing portion q2, a third facing portion q3, a fourth facing portion q4, and a fifth facing portion q5. The second facing portion position pq2 of the second facing portion q2 in the second direction D2 is between the first facing portion position pq1 of the first facing portion q1 in the second direction D2 and the third facing portion position pq3 of the third facing portion q3 in the second direction D2. The first facing portion position pq1 is between the fourth facing portion position pq4 of the fourth facing portion q4 and the second facing portion position pq2 in the second direction D2. The third facing portion position pq3 is between the second facing portion position pq2 and the fifth facing portion position pq5 of the fifth facing portion q5 in the second direction D2.

[0086] The first opposing portion q1 protrudes toward the first surface 31f using the fourth opposing portion q4 as a reference, and the third opposing portion q3 protrudes toward the first surface 31f using the fifth opposing portion q5 as a reference.

[0087] Other configuration examples of the magnetic recording device according to the embodiment will be described below.

[0088] FIG. 24 is a schematic perspective view illustrating the magnetic recording device according to the embodiment. 24, a magnetic head according to an embodiment (e.g., magnetic head 110) is used together with a magnetic recording medium 80. In this example, the magnetic head 110 includes a recording unit 60 and a reproducing unit 70. The recording unit 60 of the magnetic head 110 records information on the magnetic recording medium 80. The reproducing unit 70 reproduces the information recorded on the magnetic recording medium 80.

[0089] The magnetic recording medium 80 includes, for example, a medium substrate 82 and a magnetic recording layer 81 provided on the medium substrate 82. The magnetization 83 of the magnetic recording layer 81 is controlled by the recording section 60.

[0090] The reproducing unit 70 includes, for example, a first reproducing magnetic shield 72a, a second reproducing magnetic shield 72b, and a magnetic reproducing element 71. The magnetic reproducing element 71 is provided between the first reproducing magnetic shield 72a and the second reproducing magnetic shield 72b. The magnetic reproducing element 71 can output a signal corresponding to the magnetization 83 of the magnetic recording layer 81.

[0091] 24, magnetic recording medium 80 moves relative to magnetic head 110 in medium movement direction 85. Information corresponding to magnetization 83 of magnetic recording layer 81 is controlled at any position by magnetic head 110. Information corresponding to magnetization 83 of magnetic recording layer 81 is reproduced at any position by magnetic head 110.

[0092] FIG. 25 is a schematic perspective view illustrating a part of the magnetic recording device according to the embodiment. FIG. 25 illustrates a head slider. The magnetic head 110 is provided on a head slider 159. The head slider 159 includes, for example, Al2O3 / TiC. The head slider 159 moves relative to the magnetic recording medium while floating above or in contact with the magnetic recording medium.

[0093] The head slider 159 has, for example, an air inflow side 159A and an air outflow side 159B. The magnetic head 110 is disposed on the side of the air outflow side 159B of the head slider 159. This allows the magnetic head 110 to move relative to the magnetic recording medium while floating above or in contact with the magnetic recording medium.

[0094] FIG. 26 is a schematic perspective view illustrating the magnetic recording device according to the embodiment. 27A and 27B are schematic perspective views illustrating a part of the magnetic recording device according to the embodiment. As shown in FIG. 26, a rotary actuator is used in a magnetic recording device 150 according to the embodiment. A recording medium disk 180 is mounted on a spindle motor 180M. The recording medium disk 180 is rotated in the direction of arrow AR by the spindle motor 180M. The spindle motor 180M responds to a control signal from a drive control unit. The magnetic recording device 150 according to the embodiment may include a plurality of recording medium disks 180. The magnetic recording device 150 may also include a recording medium 181. The recording medium 181 is, for example, an SSD (Solid State Drive). The recording medium 181 may be, for example, a non-volatile memory such as a flash memory. For example, the magnetic recording device 150 may be a hybrid HDD (Hard Disk Drive).

[0095] The head slider 159 records and reproduces information to be recorded on the recording medium disk 180. The head slider 159 is provided at the tip of the thin-film suspension 154. Near the tip of the head slider 159, a magnetic head according to the embodiment is provided.

[0096] When the recording medium disk 180 rotates, the pressing pressure from the suspension 154 and the pressure generated at the air bearing surface (ABS) of the head slider 159 are balanced. The distance between the air bearing surface of the head slider 159 and the surface of the recording medium disk 180 is a predetermined flying height. In an embodiment, the head slider 159 may be in contact with the recording medium disk 180. For example, a contact traveling type may be applied.

[0097] The suspension 154 is connected to one end of an arm 155 (e.g., an actuator arm). The arm 155 has, for example, a bobbin portion. 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 a 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 an opposing yoke. The drive coil is provided between the permanent magnet and the opposing yoke. The suspension 154 has one end and the other end. The magnetic head is provided at one end of the suspension 154. The arm 155 is connected to the other end of the suspension 154.

[0098] Arm 155 is held by ball bearings. The ball bearings are provided at two locations, above and below bearing portion 157. Arm 155 can rotate and slide using voice coil motor 156. The magnetic head can be moved to any position on recording medium disk 180.

[0099] FIG. 27(a) is an enlarged perspective view of a head stack assembly 160, illustrating the configuration of a portion of the magnetic recording device. FIG. 27B is a perspective view illustrating a magnetic head assembly (head gimbal assembly: HGA) 158 that is part of the head stack assembly 160. As shown in FIG.

[0100] 27(a), 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 in the opposite direction to the extension direction of the head gimbal assembly 158. The support frame 161 supports a coil 162 of the voice coil motor 156.

[0101] As shown in FIG. 27( b ), the head gimbal assembly 158 has an arm 155 extending from a bearing portion 157 and a suspension 154 extending from the arm 155 .

[0102] A head slider 159 is provided at the tip of the suspension 154. The head slider 159 is provided with the magnetic head according to the embodiment.

[0103] A magnetic head assembly (head gimbal assembly) 158 according to the embodiment includes a magnetic head according to the embodiment, a head slider 159 provided with the magnetic head, a suspension 154, and an 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.

[0104] The suspension 154 has, for example, lead wires (not shown) for recording and reproducing signals. The suspension 154 may also have, for example, lead wires (not shown) for a heater for adjusting the flying height. The suspension 154 may also have lead wires (not shown) for an oscillation element, for example. These lead wires are electrically connected to a plurality of electrodes provided on the magnetic head.

[0105] The magnetic recording device 150 is provided with a signal processing unit 190. The signal processing unit 190 uses a magnetic head to record and reproduce signals on a magnetic recording medium. Input / output lines of the signal processing unit 190 are connected to, for example, electrode pads of the head gimbal assembly 158, and are electrically connected to the magnetic head.

[0106] The magnetic recording device 150 according to the embodiment includes a magnetic recording medium, a magnetic head according to the embodiment, a movable unit, a position control unit, and a signal processing unit. The movable unit enables the magnetic recording medium and the magnetic head to be moved relatively while being separated from each other or in contact with each other. The position control unit aligns the magnetic head with a predetermined recording position on the magnetic recording medium. The signal processing unit records and reproduces signals on the magnetic recording medium using the magnetic head.

[0107] For example, the magnetic recording medium is a recording medium disk 180. The movable part includes, for example, a head slider 159. The position control unit includes, for example, a head gimbal assembly 158.

[0108] The embodiments may include the following technical solutions. (Technical proposal 1) a first magnetic pole including a medium facing surface and a first surface intersecting the medium facing surface; a second magnetic pole including a second surface, the first surface facing the second surface in a first direction; a magnetic element provided between the first surface and the second surface, the magnetic element including a first magnetic layer and a second magnetic layer provided between the first magnetic layer and the second magnetic pole; Equipped with the first surface includes a first portion and a second portion; a second direction intersecting the medium facing surface and the first direction; the first portion and the second portion satisfy one of a first condition and a second condition; under the first condition, a first portion position of the first portion in the second direction is between a medium facing surface position of the medium facing surface in the second direction and a second portion position of the second portion in the second direction; under the second condition, the second partial position is between the medium facing surface position and the first partial position, A magnetic head, wherein a first distance along the first direction between the first portion and the second surface is shorter than a second distance along the first direction between the second portion and the second surface.

[0109] (Technical proposal 2) A magnetic head as described in Technical Solution 1, wherein the first portion protrudes toward the second surface based on the second portion.

[0110] (Technical proposal 3) the second surface includes a first opposing portion and a second opposing portion; a direction from the first portion to the first opposing portion is along the first direction; a direction from the second portion to the second opposing portion is along the first direction; A magnetic head according to Technical Solution 1 or 2, wherein the first opposing portion protrudes toward the first surface based on the second opposing portion.

[0111] (Technical proposal 4) The magnetic head according to Technical Solution 3, wherein at least a portion of the magnetic element overlaps with the first opposing portion in the second direction.

[0112] (Technical proposal 5) the first surface further includes a third portion; the second portion position is between the first portion position and a third portion position of the third portion in the second direction; A magnetic head according to Technical Solution 1 or 2, wherein a third distance along the first direction between the third portion and the second surface is shorter than the second distance.

[0113] (Technical proposal 6) A magnetic head as described in Technical Solution 5, wherein the third portion protrudes toward the second surface based on the second portion.

[0114] (Technical proposal 7) the second surface includes a first opposing portion, a second opposing portion, and a third opposing portion; a direction from the first portion to the first opposing portion is along the first direction; a direction from the second portion to the second opposing portion is along the first direction; a direction from the third portion to the third opposing portion is along the first direction; the first opposing portion protrudes toward the first surface with respect to the second opposing portion; The magnetic head described in Technical Solution 5 or 6, wherein the third opposing portion protrudes toward the first surface based on the second opposing portion.

[0115] (Technical proposal 8) The magnetic head according to any one of Technical Solutions 1 to 7, wherein at least a portion of the magnetic element overlaps with the first portion in the second direction.

[0116] (Technical proposal 9) The magnetic head according to any one of Technical Solutions 1 to 8, wherein the second direction is perpendicular to the first direction.

[0117] (Technical proposal 10) The magnetic head according to any one of Technical Schemes 1 to 9, wherein a ratio of an absolute value of a difference between the second distance and the first distance to the second distance is equal to or greater than 0.05 and equal to or less than 0.3.

[0118] (Technical proposal 11) The magnetic head according to any one of Technical Solutions 1 to 10, wherein the magnetic element further includes a non-magnetic first intermediate layer provided between the first magnetic layer and the second magnetic layer.

[0119] (Technical proposal 12) the first surface includes a fourth portion, a fifth portion, and a sixth portion; a third direction extending along the medium facing surface and intersecting the first direction; a fifth portion position of the fifth portion in the third direction is between a fourth portion position of the fourth portion in the third direction and a sixth portion position of the sixth portion in the third direction; a fourth distance between the fourth portion and the second surface along the first direction is shorter than a fifth distance between the fifth portion and the second surface along the first direction; The magnetic head according to any one of Technical Solutions 1 to 11, wherein a sixth distance along the first direction between the sixth portion and the second surface is shorter than the fifth distance.

[0120] (Technical proposal 13) The magnetic head according to Technical Solution 12, wherein the fifth portion is recessed based on the fourth portion and the sixth portion.

[0121] (Technical proposal 14) a first magnetic pole including a medium facing surface and a first surface intersecting the medium facing surface; a second magnetic pole including a second surface, the first surface facing the second surface in a first direction; a magnetic element provided between the first surface and the second surface, the magnetic element including a first magnetic layer and a second magnetic layer provided between the first magnetic layer and the second magnetic pole; Equipped with the first surface includes a first portion, a second portion, and a third portion; a second direction extending along the medium facing surface and intersecting the first direction; a second portion position of the second portion in the second direction is between a first portion position of the first portion in the second direction and a third portion position of the third portion in the second direction; a first distance along the first direction between the first portion and the second surface is shorter than a second distance along the first direction between the second portion and the second surface; a third distance along the first direction between the third portion and the second surface is shorter than the second distance; At least a portion of the magnetic element is between the second portion and the second surface.

[0122] (Technical proposal 15) The magnetic head described in Technical Solution 14, wherein the magnetic element does not overlap with the first portion in the first direction and does not overlap with the third portion in the first direction.

[0123] (Technical proposal 16) The magnetic head according to Technical Solution 14 or 15, wherein the second portion is recessed relative to the first portion and the third portion.

[0124] (Technical proposal 17) the second surface includes a first opposing portion, a second opposing portion, and a third opposing portion; a direction from the first portion to the first opposing portion is along the first direction; a direction from the second portion to the second opposing portion is along the first direction; a direction from the third portion to the third opposing portion is along the first direction; 17. The magnetic head according to any one of Technical Solutions 14 to 16, wherein the second opposing portion is set back with respect to the first opposing portion and the third opposing portion.

[0125] (Technical proposal 18) the second surface further includes a fourth opposing portion and a fifth opposing portion; a second opposing portion position of the second opposing portion in the second direction is between a first opposing portion position of the first opposing portion in the second direction and a third opposing portion position of the third opposing portion in the second direction, the first opposing portion position is between a fourth opposing portion position of the fourth opposing portion in the second direction and the second opposing portion position, the third opposing portion position is between the second opposing portion position and a fifth opposing portion position of the fifth opposing portion in the second direction, the first opposing portion protrudes toward the first surface with respect to the fourth opposing portion; A magnetic head according to Technical Solution 17, wherein the third opposing portion protrudes toward the first surface based on the fifth opposing portion.

[0126] (Technical proposal 19) the first surface further includes a fourth portion and a fifth portion; the first partial position is between a fourth partial position of the fourth portion in the second direction and the second partial position, the third portion position is between the second portion position and a fifth portion position of the fifth portion in the second direction, the first portion protrudes toward the second surface relative to the fourth portion; The magnetic head according to any one of Technical Solutions 14 to 18, wherein the third portion protrudes toward the second surface with the fifth portion as a reference. (Technical proposal 20)

[0127] A magnetic head according to any one of technical proposals 1 to 19; a magnetic recording medium; Equipped with the medium-facing surface faces the magnetic recording medium, The magnetic head is configured to record information on the magnetic recording medium.

[0128] According to the embodiment, a magnetic recording device capable of improving recording density can be provided.

[0129] In this specification, "vertical" and "parallel" do not only mean strictly vertical and strictly parallel, but also include variations in the manufacturing process, and may mean substantially vertical and substantially parallel.

[0130] The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. For example, the specific configurations of the elements included in the magnetic head and magnetic recording device, such as the magnetic pole, magnetic element, magnetic layer, non-magnetic layer, and control unit, are within the scope of the present invention as long as a person skilled in the art can implement the present invention in a similar manner and obtain similar effects by appropriately selecting them from known ranges.

[0131] Any combination of two or more elements of each embodiment to the extent technically possible is also included within the scope of the present invention as long as it encompasses the gist of the present invention.

[0132] In addition, all magnetic recording devices that can be implemented by a person skilled in the art by making appropriate design modifications based on the magnetic recording device described above as an embodiment of the present invention also fall within the scope of the present invention, as long as they include the gist of the present invention.

[0133] In addition, within the scope of the concept of the present invention, a person skilled in the art may come up with various modifications and alterations, and it will be understood that these modifications and alterations also fall within the scope of the present invention.

[0134] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0135] 20: magnetic element, 20D: element circuit, 21, 22: first and second magnetic layers, 21n: first intermediate layer, 30D: recording circuit, 30F: medium facing surface, 30c: coil, 30i: insulating portion, 31, 32: first and second magnetic poles, 31f, 32f: first and second surfaces, 33: shield, 41, 42: first and second non-magnetic layers, 60: recording portion, 70: reproducing portion, 71: magnetic reproducing element, 72a, 72b: first and second reproducing magnetic shields, 75: control portion, 80: magnetic recording medium, 81: magnetic recording layer, 82: medium substrate, 83: magnetization, 85: medium movement direction 110, 110a to 110l, 111, 120, 120a, 120b, 121 to 123: 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 inlet side, 159B: air outlet side, 160: head stack assembly, 161: support frame, 162: coil, 180: recording medium disk, 180M: spindle motor, 181: recording medium, 190: signal processing unit, 210: magnetic recording device, AR: arrow, D1 to D3: first to third directions, Iw: recording current, T1, T2: first and second terminals, Tc1, Tc2: first and second coil terminals, W1, W2: 1st and 2nd wiring, d1-d6: 1st-6th distance, ic: element current, je: electron current, p1-p6: 1st-6th portion, pp1-pp6: 1st-6th portion position, ppF: medium facing surface position, pq1-pq6: 1st-5th opposing portion position, q1-q6: 1st-6th opposing portion, t21, t21n, t22, t41, t42: thickness

Claims

1. a first magnetic pole including a medium facing surface and a first surface intersecting the medium facing surface; a second magnetic pole including a second surface, the first surface facing the second surface in a first direction; a magnetic element provided between the first surface and the second surface, the magnetic element including a first magnetic layer and a second magnetic layer provided between the first magnetic layer and the second magnetic pole; Equipped with the first surface includes a first portion and a second portion; a second direction intersecting the medium facing surface and the first direction; the first portion and the second portion satisfy one of a first condition and a second condition; under the first condition, a first portion position of the first portion in the second direction is between a medium facing surface position of the medium facing surface in the second direction and a second portion position of the second portion in the second direction; under the second condition, the second partial position is between the medium facing surface position and the first partial position, A magnetic head, wherein a first distance along the first direction between the first portion and the second surface is shorter than a second distance along the first direction between the second portion and the second surface.

2. The magnetic head according to claim 1 , wherein the first portion protrudes toward the second surface with respect to the second portion.

3. the second surface includes a first opposing portion and a second opposing portion; a direction from the first portion to the first opposing portion is along the first direction; a direction from the second portion to the second opposing portion is along the first direction; 2. The magnetic head according to claim 1, wherein the first opposing portion protrudes toward the first surface with respect to the second opposing portion.

4. the first surface further includes a third portion; the second portion position is between the first portion position and a third portion position of the third portion in the second direction; The magnetic head according to claim 1 , wherein a third distance along the first direction between the third portion and the second surface is shorter than the second distance.

5. The magnetic head according to claim 4 , wherein the third portion protrudes toward the second surface with respect to the second portion.

6. the second surface includes a first opposing portion, a second opposing portion, and a third opposing portion; a direction from the first portion to the first opposing portion is along the first direction; a direction from the second portion to the second opposing portion is along the first direction; a direction from the third portion to the third opposing portion is along the first direction; the first opposing portion protrudes toward the first surface with respect to the second opposing portion; 5. The magnetic head according to claim 4, wherein the third opposing portion protrudes toward the first surface with respect to the second opposing portion.

7. the first surface includes a fourth portion, a fifth portion, and a sixth portion; a third direction extending along the medium facing surface and intersecting the first direction; a fifth portion position of the fifth portion in the third direction is between a fourth portion position of the fourth portion in the third direction and a sixth portion position of the sixth portion in the third direction; a fourth distance between the fourth portion and the second surface along the first direction is shorter than a fifth distance between the fifth portion and the second surface along the first direction; 7. The magnetic head according to claim 1, wherein a sixth distance along the first direction between the sixth portion and the second surface is shorter than the fifth distance.

8. a first magnetic pole including a medium facing surface and a first surface intersecting the medium facing surface; a second magnetic pole including a second surface, the first surface facing the second surface in a first direction; a magnetic element provided between the first surface and the second surface, the magnetic element including a first magnetic layer and a second magnetic layer provided between the first magnetic layer and the second magnetic pole; Equipped with the first surface includes a first portion, a second portion, and a third portion; a second direction extending along the medium facing surface and intersecting with the first direction; a second portion position of the second portion in the second direction is between a first portion position of the first portion in the second direction and a third portion position of the third portion in the second direction; a first distance along the first direction between the first portion and the second surface is shorter than a second distance along the first direction between the second portion and the second surface; a third distance along the first direction between the third portion and the second surface is shorter than the second distance; At least a portion of the magnetic element is between the second portion and the second surface.

9. The magnetic head of claim 8 , wherein the magnetic element does not overlap the first portion in the first direction and does not overlap the third portion in the first direction.

10. a magnetic head according to claim 1 or 8; a magnetic recording medium; Equipped with the medium-facing surface faces the magnetic recording medium, The magnetic head is configured to record information on the magnetic recording medium.

Images