Magnetic head and magnetic recording device

Abstract

To provide a magnetic head and a magnetic recording device capable of improving characteristics.SOLUTION: According to one embodiment, a magnetic head includes a reproducing part including a first reproducing element. The first reproducing element includes first to fourth shields, a first magnetic member, a first connection conductive member, and first to fifth terminals. The first magnetic member is provided between the first and second shields and between the third and fourth shields. The first magnetic member includes first to fourth portions. The first connecting conductive member is electrically connected with the first magnetic member. The first terminal is electrically connected to the first portion. The second terminal is electrically connected to the second portion. The third terminal is electrically connected to the third portion. The fourth terminal is electrically connected to the fourth portion. The fifth terminal is electrically connected with the first connecting conductive member.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 Information is recorded on a magnetic recording medium such as an HDD (Hard Disk Drive) by using a magnetic head including a magnetic sensor using a magnetic layer. Improvements in the characteristics of magnetic heads are desired. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] U.S. Patent No. 7,576,948 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 reproducing section including a first reproducing element. The first reproducing element includes a first shield, a second shield, a third shield, a fourth shield, a first magnetic member, a first connecting conductive member, a first terminal, a second terminal, a third terminal, a fourth terminal, and a fifth terminal. A second direction from the third shield to the fourth shield intersects with a first direction from the first shield to the second shield. The first magnetic member is disposed between the first shield and the second shield and between the third shield and the fourth shield. The first magnetic member includes a first portion, a second portion, a third portion, and a fourth portion. The first portion is located between the first shield and the second shield in the first direction. The second portion is located between the first portion and the second shield in the first direction. The third portion is located between the third shield and the fourth shield in the second direction. The fourth portion is located between the third portion and the fourth shield in the second direction. The first connecting conductive member is electrically connected to the first magnetic member. A direction from at least a portion of the first magnetic member to the first connecting conductive member is along a third direction that intersects with a plane including the first direction and the second direction. The first terminal is electrically connected to the first portion. The second terminal is electrically connected to the second portion. The third terminal is electrically connected to the third portion. The fourth terminal is electrically connected to the fourth portion. The fifth terminal is electrically connected to the first connecting conductive member. [Brief explanation of the drawings]

[0006] [Figure 1] 1A and 1B are schematic views illustrating the magnetic head according to the first embodiment. [Figure 2] FIG. 2 is a schematic cross-sectional 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] 10A and 10B are schematic views 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] FIG. 16 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 17] FIG. 17 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. [Figure 18] FIG. 18 is a schematic perspective view illustrating the magnetic head and the magnetic recording device according to the embodiment. [Figure 19] FIG. 19 is a schematic perspective view illustrating a part of the magnetic recording device according to the embodiment. [Figure 20] FIG. 20 is a schematic perspective view illustrating the magnetic recording device according to the embodiment. [Figure 21]21A and 21B are schematic perspective views illustrating a part of the magnetic recording device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0007] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between parts, etc. are not necessarily the same as those in reality. Even when the same part is shown, the dimensions and ratios may be different depending on the drawing. In this specification and in each drawing, elements similar to those previously described with reference to the previous drawings are designated by the same reference numerals, and detailed descriptions thereof will be omitted where appropriate.

[0008] (First embodiment) 1A and 1B are schematic views illustrating the magnetic head according to the first embodiment. FIG. 2 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. Fig. 1(a) is a plan view, Fig. 1(b) is a cross-sectional view taken along line A3-A4 in Fig. 1(a), and Fig. 2 is a cross-sectional view taken along line A1-A2 in Fig. 1(a). 1, the magnetic head 110 according to the embodiment includes a reproducing section 70. The reproducing section 70 includes a first reproducing element 70a. The first reproducing element 70a includes a first shield 41, a second shield 42, a third shield 43, a fourth shield 44, a first magnetic member 11, a first connecting conductive member 68a, a first terminal 51, a second terminal 52, a third terminal 53, a fourth terminal 54, and a fifth terminal 55.

[0009] A second direction D2 from the third shield 43 to the fourth shield 44 intersects with the first direction D1 from the first shield 41 to the second shield 42.

[0010] In this example, the first direction D1 is the X-axis direction. One direction perpendicular to the X-axis direction is the Y-axis direction. The direction perpendicular to the X-axis and Y-axis directions is the Z-axis direction. The second direction D2 is, for example, the Y-axis direction.

[0011] The X-axis direction corresponds to, for example, the down-track direction, the Y-axis direction corresponds to, for example, the cross-track direction, and the Z-axis direction corresponds to, for example, the height direction.

[0012] The first magnetic member 11 is provided between the first shield 41 and the second shield 42, and between the third shield 43 and the fourth shield 44.

[0013] The first magnetic member 11 includes a first portion 11a, a second portion 11b, a third portion 11c, and a fourth portion 11d. The first portion 11a is located between the first shield 41 and the second shield 42 in the first direction D1. The second portion 11b is located between the first portion 11a and the second shield 42 in the first direction D1. The third portion 11c is located between the third shield 43 and the fourth shield 44 in the second direction D2. The fourth portion 11d is located between the third portion 11c and the fourth shield 44 in the second direction D2.

[0014] The first connecting conductive member 68a is electrically connected to the first magnetic member 11. The first connecting conductive member 68a may be non-magnetic. The direction from at least a portion of the first magnetic member 11 to the first connecting conductive member 68a is along the third direction D3. The third direction D3 intersects with a plane including the first direction D1 and the second direction D2. The third direction D3 is, for example, the Z-axis direction.

[0015] The first terminal 51 is electrically connected to the first portion 11a. The second terminal 52 is electrically connected to the second portion 11b. The third terminal 53 is electrically connected to the third portion 11c. The fourth terminal 54 is electrically connected to the fourth portion 11d. The fifth terminal 55 is electrically connected to the first connecting conductive member 68a.

[0016] In this example, the first reproducing element 70a further includes a first conductive member 61 and a second conductive member 62. The first conductive member 61 is provided between the first shield 41 and the first magnetic member 11. The first conductive member 61 may be non-magnetic. The second conductive member 62 is provided between the first magnetic member 11 and the second shield 42. The second conductive member 62 may be non-magnetic. The first conductive member 61 electrically connects the first shield 41 to the first portion 11a. The second conductive member 62 electrically connects the second shield 42 to the second portion 11b. The first terminal 51 may be electrically connected to the first portion 11a via the first shield 41 and the first conductive member 61. The second terminal 52 may be electrically connected to the second portion 11b via the second shield 42 and the second conductive member 62.

[0017] The first reproducing element 70a may further include a third conductive member 63 and a fourth conductive member 64. The third conductive member 63 is provided between the third shield 43 and the first magnetic member 11. The third conductive member 63 may be non-magnetic. The fourth conductive member 64 is provided between the first magnetic member 11 and the fourth shield 44. The fourth conductive member 64 may be non-magnetic. The third conductive member 63 electrically connects the third shield 43 to the third portion 11c. The fourth conductive member 64 electrically connects the fourth shield 44 to the fourth portion 11d. The third terminal 53 may be electrically connected to the third portion 11c via the third shield 43 and the third conductive member 63. The fourth terminal 54 may be electrically connected to the fourth portion 11d via the fourth shield 44 and the fourth conductive member 64.

[0018] In an embodiment, five or more terminals are provided. This increases the variety of signals that can be obtained from the magnetic recording medium. This makes it possible to more accurately reproduce information recorded on the magnetic recording medium. This makes it easier to achieve, for example, a high recording density. According to an embodiment, a magnetic head capable of improving characteristics can be provided.

[0019] For example, a current is supplied between the third terminal 53 and the fourth terminal 54. A first voltage V1 (first signal) between the first terminal 51 and the second terminal 52 is configured to change in accordance with the magnetic field to be detected when a current flows between the third terminal 53 and the fourth terminal 54. A second voltage V2 (second signal) between the first terminal 51 and the fifth terminal 55 is configured to change in accordance with the magnetic field to be detected when a current flows between the third terminal 53 and the fourth terminal 54. Such a change in voltage (electrical signal) is thought to be caused by, for example, the anomalous Hall effect.

[0020] For example, a current is supplied by the second circuit 75b. A first voltage V1 is detected by the first circuit 75a. A second voltage V2 is detected by the third circuit 75c. This allows the detection of a magnetic field to be detected. The magnetic field to be detected is based on, for example, information recorded on a magnetic recording medium.

[0021] As shown in FIG. 2, the first reproducing element 70a includes a medium facing surface 70F. The medium facing surface 70F faces the magnetic recording medium 80. The first shield 41 includes a first end 41F corresponding to the medium facing surface 70F. The second shield 42 includes a second end 42F corresponding to the medium facing surface 70F. As shown in FIG. 1(b), the third shield 43 includes a third end 43F corresponding to the medium facing surface 70F. The fourth shield 44 includes a fourth end 44F corresponding to the medium facing surface 70F.

[0022] A first distance in the third direction D3 between the first end 41F and the first conductive member 61 is shorter than the distance in the third direction D3 between the first end 41F and the first connecting conductive member 68a. A second distance in the third direction D3 between the second end 42F and the second conductive member 62 is shorter than the distance in the third direction D3 between the second end 42F and the first connecting conductive member 68a. A third distance in the third direction D3 between the third end 43F and the third conductive member 63 is shorter than the distance in the third direction D3 between the third end 43F and the first connecting conductive member 68a. A fourth distance in the third direction D3 between the fourth end 44F and the fourth conductive member 64 is shorter than the distance in the third direction D3 between the fourth end 44F and the first connecting conductive member 68a. The first to fourth distances may be zero.

[0023] The direction from the first conductive member 61 to the first connecting conductive member 68a intersects with the direction from the first conductive member 61 to the second conductive member 62. In this example, the direction from the first conductive member 61 to the first connecting conductive member 68a is inclined with respect to the first direction D1. The direction from the first conductive member 61 to the second conductive member 62 is along the first direction D1.

[0024] For example, the first voltage V1 between the first terminal 51 electrically connected to the first conductive member 61 and the second terminal 52 electrically connected to the second conductive member 62 corresponds to, for example, a component of the characteristics of the first magnetic member 11 along the third direction D3.

[0025] The second voltage V2 between the first terminal 51 electrically connected to the first conductive member 61 and the fifth terminal 55 electrically connected to the first connecting conductive member 68a corresponds to, for example, a component of the characteristic of the first magnetic member 11 in a direction intersecting the third direction D3. The second voltage V2 corresponds to, for example, a component of the characteristic of the first magnetic member 11 that is inclined with respect to the third direction D3.

[0026] In the embodiment, information about the component in the third direction D3 and the component intersecting the third direction D3 (for example, the component tilted with respect to the third direction D3) is obtained, which allows for more accurate reproduction of information recorded on the magnetic recording medium.

[0027] The direction from the third conductive member 63 to the first connecting conductive member 68a intersects with the direction from the third conductive member 63 to the fourth conductive member 64. In this example, the direction from the third conductive member 63 to the first connecting conductive member 68a is inclined with respect to the second direction D2. The direction from the third conductive member 63 to the fourth conductive member 64 is along the second direction D2.

[0028] 2, the magnetic recording medium 80 includes a first recording area 80a and a second recording area 80b. The direction from the first recording area 80a to the second recording area 80b is, for example, along a first direction D1. The magnetic field to be detected by the first reproducing element 70a depends on the state of the first recording area 80a and the state of the second recording area 80b. For example, the second recording area 80b is adjacent to the first recording area 80a in the downtrack direction.

[0029] The magnetic recording medium 80 may be a perpendicular magnetization film. For example, the first voltage V1 (first signal) corresponds to a first component along a third direction D3 of a magnetic field generated by the first magnetization of the first recording area 80a and the second magnetization of the second recording area 80b. The second voltage V2 (second signal) corresponds to a second component along a second direction D2 of a magnetic field generated by the first magnetization of the first recording area 80a and the second magnetization of the second recording area 80b. For example, the first voltage V1 (first signal) corresponds to, for example, a perpendicular component. The second voltage V2 (second signal) corresponds to, for example, a horizontal component.

[0030] In the example of the magnetic head 110, for example, the second circuit 75b includes a current source. For example, the first circuit 75a and the third circuit 75c include voltmeters. At least some of the first circuit 75a, the second circuit 75b, and the third circuit 75c may be considered to be included in the magnetic head 110 for convenience. At least some of the first circuit 75a, the second circuit 75b, and the third circuit 75c may be provided separately from the magnetic head 110. These circuits may be included in the magnetic recording device.

[0031] In the embodiment, a current may be supplied between the first terminal 51 and the second terminal 52. For example, the voltage between the third terminal 53 and the fourth terminal 54 may be configured to change in accordance with the magnetic field to be detected when a current flows between the first terminal 51 and the second terminal 52. The voltage between the third terminal 53 and the fifth terminal 55 may be configured to change in accordance with the magnetic field to be detected when a current flows between the first terminal 51 and the second terminal 52.

[0032] The first magnetic member 11 has, for example, the anomalous Hall effect. For example, the first magnetic member 11 may include at least one selected from the group consisting of Co2MnGa, Co2MnAl, FePt, MnGa, Mn3Sn, Mn3Ge, Mn3Ga, RuO2, MnTe, CrSb, and Mn5Si3. These materials can effectively achieve, for example, the anomalous Hall effect. The first magnetic member 11 may include a Weyl ferromagnet. The first magnetic member 11 may include an L10 ordered alloy. The first magnetic member 11 may include a Weyl antiferromagnet. The first magnetic member 11 may include an alternating magnetic material.

[0033] In one example, at least one of the first conductive member 61, the second conductive member 62, the third conductive member 63, the fourth conductive member 64, and the first connecting conductive member 68a may include at least one selected from the group consisting of Cu, Au, Ag, Pt, Al, Pd, Ta, Ru, Hf, W, Mo, Ir, Cr, Tb, and Rh. These materials can, for example, suppress the influence of spin between the shield and the first magnetic member 11. High sensitivity can be easily obtained.

[0034] 1(a), in this example, in the first direction D1, the third shield 43 is located between a part of the first shield 41 and a part of the second shield 42. In the first direction D1, the fourth shield 44 is located between another part of the first shield 41 and another part of the second shield 42.

[0035] The first shield 41 is, for example, a leading shield. The second shield 42 is, for example, a trailing shield. The third shield 43 is at least a part of a side shield. The fourth shield 44 is at least a part of a side shield.

[0036] The first shield 41 is, for example, a bottom shield. The second shield 42 is, for example, a top shield. The third shield 43 is at least a part of a side bias layer. The fourth shield 44 is at least a part of a side bias layer.

[0037] 1(a), the first reproducing element 70a may further include a first insulating member 31. The first insulating member 31 includes a first insulating region 31a and a second insulating region 31b. At least a portion of the first insulating region 31a is provided between a portion of the first shield 41 and the third shield 43. At least a portion of the second insulating region 31b is provided between another portion of the first shield 41 and the fourth shield 44.

[0038] 1(a) and 1(b), the first insulating member 31 may further include a third insulating region 31c and a fourth insulating region 31d. At least a portion of the third insulating region 31c is provided between the third shield 43 and a portion of the second shield 42. At least a portion of the fourth insulating region 31d is provided between the fourth shield 44 and another portion of the second shield 42.

[0039] 1(b) and 2, the direction from the first magnetic member 11 to a portion of the first insulating member 31 may be along a third direction D3. The portion of the first insulating member 31 may be provided between the first shield 41 and the second shield 42. The portion of the first insulating member 31 may be provided between the third shield 43 and the fourth shield 44.

[0040] As shown in FIG. 1(b), the length of the first magnetic member 11 along the third direction D3 is defined as length L3. The length of the first magnetic member 11 along the second direction D2 is defined as length L2. For example, length L3 may be longer than length L2. For example, due to shape anisotropy, the component of the magnetization of the first magnetic member 11 along the third direction D3 becomes larger. This makes it easier to detect the magnetic field to be detected with higher sensitivity.

[0041] 2, the length of the first magnetic member 11 along the first direction D1 is defined as length L1. For example, length L3 may be longer than length L1. For example, due to shape anisotropy, the component of the magnetization of the first magnetic member 11 along the third direction D3 becomes larger. This makes it easier to detect the magnetic field to be detected with higher sensitivity.

[0042] FIG. 3 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 3, in the magnetic head 111 according to the embodiment, the first reproducing element 70a includes a second magnetic member 12. The configuration of the magnetic head 111 other than this may be the same as the configuration of the magnetic head 110.

[0043] In the magnetic head 111, the first reproducing element 70a includes a second magnetic member 12 in addition to the first magnetic member 11. The direction from the first magnetic member 11 to the second magnetic member 12 is along the third direction D3. The second magnetic member 12 includes, for example, IrMn. The second magnetic member 12 stabilizes the magnetization of the first magnetic member 11. More stable reproduction is possible.

[0044] As in the example of the magnetic head 111, the first connecting conductive member 68a may be disposed between the first magnetic member 11 and the second magnetic member 12 in the third direction D3. The fifth terminal 55 may be electrically connected to the first magnetic member 11 via the second magnetic member 12 and the first connecting conductive member 68a.

[0045] FIG. 4 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 4, in the magnetic head 112 according to the embodiment, the configuration of the first connecting conductive member 68a is different from that in the magnetic head 111. Except for this, the configuration of the magnetic head 112 may be the same as the configuration of the magnetic head 111.

[0046] In the magnetic head 112, the distance in the first direction D1 between the first shield 41 and the first connecting conductive member 68a is longer than the distance in the first direction D1 between the second shield 42 and the first connecting conductive member 68a. For example, the reproduction characteristics in the downtrack direction can be made asymmetric. For example, the signal in the second record area 80b (see FIG. 2) can be made larger than the signal in the first record area 80a (see FIG. 2).

[0047] FIG. 5 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 5, in the magnetic head 113 according to the embodiment, the configuration of the first connecting conductive members 68a is different from that in the magnetic head 112. Except for this, the configuration of the magnetic head 113 may be the same as the configuration of the magnetic head 112.

[0048] In the magnetic head 113, the distance in the first direction D1 between the first shield 41 and the first connecting conductive member 68a is shorter than the distance in the first direction D1 between the second shield 42 and the first connecting conductive member 68a. For example, the reproduction characteristics in the downtrack direction can be made asymmetric. For example, the signal in the first record area 80a (see FIG. 2) can be made larger than the signal in the second record area 80b (see FIG. 2).

[0049] FIG. 6 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 6, in the magnetic head 114 according to this embodiment, the configuration of the first connecting conductive members 68a is different from that in the magnetic head 110. Except for this, the configuration of the magnetic head 114 may be the same as the configuration of the magnetic head 110.

[0050] In the magnetic head 114, a portion of the first connecting conductive member 68a is located between the first magnetic member 11 and the second magnetic member 12 in the third direction D3. A portion of the first magnetic member 11 is located between a portion of the first connecting conductive member 68a and another portion of the first connecting conductive member 68a in the second direction D2. A portion of the second magnetic member 12 is located between a portion of the first connecting conductive member 68a and another portion of the first connecting conductive member 68a in the second direction D2.

[0051] In the magnetic heads 110 to 114, the first connecting conductive members 68a overlap with a portion of the first magnetic member 11 in the third direction D3.

[0052] FIG. 7 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 7, in the magnetic head 115 according to the embodiment, the configuration of the first connecting conductive members 68a is different from that in the magnetic head 110. Except for this, the configuration of the magnetic head 115 may be the same as the configuration of the magnetic head 110.

[0053] In the magnetic head 115, a portion of the first connecting conductive member 68a is located between the first magnetic member 11 and the second shield 42. Another portion of the first connecting conductive member 68a is located between the second magnetic member 12 and the second shield 42. The first connecting conductive member 68a is spaced apart from the second shield 42. The first connecting conductive member 68a is electrically connected to the first magnetic member 11 and the second magnetic member 12. The distance along the first direction D1 between the first shield 41 and the first connecting conductive member 68a is longer than the distance along the first direction D1 between the second shield 42 and the first connecting conductive member 68a.

[0054] FIG. 8 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 8, in a magnetic head 116 according to this embodiment, the configuration of the first connecting conductive members 68a is different from that in the magnetic head 110. Except for this, the configuration of the magnetic head 115 may be the same as the configuration of the magnetic head 110.

[0055] In the magnetic head 116, a portion of the first connecting conductive member 68a is located between the first magnetic member 11 and the first shield 41. Another portion of the first connecting conductive member 68a is located between the second magnetic member 12 and the first shield 41. The first connecting conductive member 68a is spaced apart from the first shield 41. The first connecting conductive member 68a is electrically connected to the first magnetic member 11 and the second magnetic member 12. The distance along the first direction D1 between the first shield 41 and the first connecting conductive member 68a is shorter than the distance along the first direction D1 between the second shield 42 and the first connecting conductive member 68a.

[0056] In the above magnetic heads 111 to 116, five terminals also increase the variety of signals that can be obtained from the magnetic recording medium. For example, a first voltage V1 and a second voltage V2 can be obtained. Information recorded on the magnetic recording medium can be detected more accurately. This makes it easier to achieve high recording density, for example. A magnetic head with improved characteristics can be provided.

[0057] FIG. 9 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 9, in a magnetic head 117 according to this embodiment, a first reproducing element 70a includes a second connecting conductive member 68b. Except for this, the configuration of the magnetic head 117 may be the same as that of the magnetic head 110.

[0058] In the magnetic head 117, the first reproducing element 70a includes a second connecting conductive member 68b and a sixth terminal 56. The second connecting conductive member 68b is electrically connected to the first magnetic member 11. The second connecting conductive member 68b may be non-magnetic. The sixth terminal 56 is electrically connected to the second connecting conductive member 68b. For example, the direction from the first connecting conductive member 68a to the second connecting conductive member 68b intersects with the third direction D3. In this example, the direction from the first connecting conductive member 68a to the second connecting conductive member 68b is along the first direction D1.

[0059] For example, by processing the signal (voltage signal) obtained from the sixth terminal 56, it is possible to reproduce information recorded on the magnetic recording medium 80 with higher accuracy.

[0060] For example, the third voltage V3 (third signal) between the first terminal 51 and the sixth terminal 56 may be configured to change according to the magnetic field to be detected when a current flows between the third terminal 53 and the fourth terminal 54.

[0061] A fourth circuit 75d may be provided. The fourth circuit 75d may be configured to detect, for example, a third voltage V3 between the first terminal 51 and the sixth terminal 56. In an embodiment, information recorded on the magnetic recording medium 80 may be reproduced by processing at least two of the first voltage V1, the second voltage V2, and the third voltage V3.

[0062] In the magnetic heads 110 to 117, the fourth voltage V4 between the third terminal 53 and the fourth terminal 54 may be configured to change in response to the magnetic field to be detected when a current flows between the third terminal 53 and the fourth terminal 54. Such a change in voltage (electrical signal) may be caused by, for example, at least one of anisotropic magnetoresistance and giant magnetoresistance. In an embodiment, information recorded on the magnetic recording medium 80 may be reproduced by processing at least two of the first voltage V1, the second voltage V2, the third voltage V3, and the fourth voltage V4.

[0063] 10A and 10B are schematic views illustrating the magnetic head according to the first embodiment. Fig. 10(a) is a plan view, and Fig. 10(b) is a cross-sectional view taken along line A3-A4 of Fig. 10(a). As shown in FIGS. 10(a) and 10(b), a magnetic head 110a according to the embodiment includes a reproducing section 70. The reproducing section 70 includes a first reproducing element 70a. In the magnetic head 110a, a third circuit 75c is connected between the third terminal 53 and the first connecting conductive member 68a. Except for this, the configuration of the magnetic head 110a may be the same as that of the magnetic head 110. For example, the structure illustrated in FIG. 2 may be applied to the magnetic head 110a.

[0064] In the magnetic head 110a, for example, a first voltage V1 (first signal) between the third terminal 53 and the fourth terminal 54 is configured to change in accordance with the magnetic field to be detected when a current flows between the first terminal 51 and the second terminal 52. For example, a second voltage V2 between the third terminal 53 and the fifth terminal 55 is configured to change in accordance with the magnetic field to be detected when a current flows between the first terminal 51 and the second terminal 52.

[0065] For example, in this example, the first circuit 75a includes a current source. The second circuit 75b and the third circuit 75c include voltmeters. For example, a greater variety of signals can be obtained from the magnetic recording medium. Information recorded on the magnetic recording medium can be reproduced more accurately. This makes it easier to achieve high recording density, for example. A magnetic head with improved characteristics can be provided.

[0066] The direction from the third conductive member 63 to the first connecting conductive member 68a intersects with the direction from the third conductive member 63 to the fourth conductive member 64. In this example, the direction from the third conductive member 63 to the first connecting conductive member 68a is inclined with respect to the second direction D2. The direction from the third conductive member 63 to the fourth conductive member 64 is along the second direction D2. The magnetic head 110a also obtains information regarding a component in the third direction D3 and a component intersecting the third direction D3 (for example, a component inclined with respect to the third direction D3). This allows for more accurate reproduction of information recorded on the magnetic recording medium.

[0067] As shown in FIG. 10(b), the magnetic recording medium 80 includes a first recording area 80a and a second recording area 80b. The direction from the first recording area 80a to the second recording area 80b intersects with the third direction D3. In this example, the direction from the first recording area 80a to the second recording area 80b is along the second direction D2. The magnetic field to be detected by the first reproducing element 70a depends on the state of the first recording area 80a and the state of the second recording area 80b. For example, the second recording area 80b is adjacent to the first recording area 80a in the cross-track direction.

[0068] FIG. 11 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 11, in a magnetic head 111a according to the embodiment, a first reproducing element 70a includes a second magnetic member 12. Except for this, the configuration of the magnetic head 111a may be similar to that of the magnetic head 110a.

[0069] In the magnetic head 111a, the direction from the first magnetic member 11 to the second magnetic member 12 is along the third direction D3. The second magnetic member 12 includes, for example, IrMn. The second magnetic member 12 stabilizes the magnetization of the first magnetic member 11, enabling more stable reproduction.

[0070] As in the example of the magnetic head 111a, the first connecting conductive member 68a may be disposed between the first magnetic member 11 and the second magnetic member 12 in the third direction D3. The fifth terminal 55 may be electrically connected to the first magnetic member 11 via the second magnetic member 12 and the first connecting conductive member 68a.

[0071] FIG. 12 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 12, in a magnetic head 112a according to this embodiment, the configuration of the first connecting conductive members 68a is different from that in the magnetic head 111a. Except for this, the configuration of the magnetic head 112a may be the same as the configuration of the magnetic head 111a.

[0072] In the magnetic head 112a, the distance in the second direction D2 between the third shield 43 and the first connecting conductive member 68a is longer than the distance in the second direction D2 between the fourth shield 44 and the first connecting conductive member 68a. For example, the reproduction characteristics in the cross-track direction can be made asymmetric.

[0073] FIG. 13 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 13, in the magnetic head 113a according to the embodiment, the configuration of the first connecting conductive member 68a is different from that in the magnetic head 112a. Except for this, the configuration of the magnetic head 113a may be the same as the configuration of the magnetic head 112a.

[0074] In the magnetic head 113a, the distance in the second direction D2 between the third shield 43 and the first connecting conductive member 68a is shorter than the distance in the second direction D2 between the fourth shield 44 and the first connecting conductive member 68a. For example, the reproduction characteristics in the cross-track direction can be made asymmetric.

[0075] FIG. 14 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 14, in a magnetic head 114a according to this embodiment, the configuration of the first connecting conductive members 68a is different from that in the magnetic head 110a. Except for this, the configuration of the magnetic head 114a may be the same as the configuration of the magnetic head 110a.

[0076] In the magnetic head 114a, a portion of the first connecting conductive member 68a is located between the first magnetic member 11 and the second magnetic member 12 in the third direction D3. A portion of the first magnetic member 11 is located between a portion of the first connecting conductive member 68a and another portion of the first connecting conductive member 68a in the second direction D2. A portion of the second magnetic member 12 is located between a portion of the first connecting conductive member 68a and another portion of the first connecting conductive member 68a in the second direction D2.

[0077] In the magnetic heads 110a to 114a, the first connecting conductive members 68a overlap with a portion of the first magnetic member 11 in the third direction D3.

[0078] FIG. 15 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 15, in a magnetic head 115a according to this embodiment, the configuration of the first connecting conductive members 68a is different from that in the magnetic head 110a. Except for this, the configuration of the magnetic head 115a may be the same as the configuration of the magnetic head 110a.

[0079] In the magnetic head 115a, a portion of the first connecting conductive member 68a is located between the first magnetic member 11 and the fourth shield 44. Another portion of the first connecting conductive member 68a is located between the second magnetic member 12 and the fourth shield 44. The first connecting conductive member 68a is spaced apart from the fourth shield 44. The first connecting conductive member 68a is electrically connected to the first magnetic member 11 and the second magnetic member 12. The distance along the second direction D2 between the third shield 43 and the first connecting conductive member 68a is longer than the distance along the second direction D2 between the second shield 42 and the first connecting conductive member 68a.

[0080] FIG. 16 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 16, in a magnetic head 116a according to this embodiment, the configuration of the first connecting conductive members 68a is different from that in the magnetic head 110a. Except for this, the configuration of the magnetic head 115a may be the same as the configuration of the magnetic head 110a.

[0081] In the magnetic head 116a, a portion of the first connecting conductive member 68a is located between the first magnetic member 11 and the third shield 43. Another portion of the first connecting conductive member 68a is located between the second magnetic member 12 and the third shield 43. The first connecting conductive member 68a is spaced apart from the third shield 43. The first connecting conductive member 68a is electrically connected to the first magnetic member 11 and the second magnetic member 12. The distance along the second direction D2 between the third shield 43 and the first connecting conductive member 68a is shorter than the distance along the second direction D2 between the fourth shield 44 and the first connecting conductive member 68a.

[0082] In the above magnetic heads 111a to 116a, five terminals also allow a greater variety of signals to be obtained from the magnetic recording medium. For example, a first voltage V1 and a second voltage V2 can be obtained. Information recorded on the magnetic recording medium can be detected more accurately. This makes it easier to achieve a high recording density, for example. A magnetic head with improved characteristics can be provided.

[0083] FIG. 17 is a schematic cross-sectional view illustrating the magnetic head according to the first embodiment. 17, in a magnetic head 117a according to this embodiment, a first reproducing element 70a includes a second connecting conductive member 68b. Except for this, the configuration of the magnetic head 117a may be similar to the configuration of the magnetic head 110a.

[0084] In the magnetic head 117a, the second connecting conductive member 68b is electrically connected to the first magnetic member 11. The second connecting conductive member 68b may be non-magnetic. The sixth terminal 56 is electrically connected to the second connecting conductive member 68b. For example, the direction from the first connecting conductive member 68a to the second connecting conductive member 68b intersects with the third direction D3. In this example, the direction from the first connecting conductive member 68a to the second connecting conductive member 68b is along the second direction D2.

[0085] For example, by processing the signal (voltage signal) obtained from the sixth terminal 56, it is possible to reproduce information recorded on the magnetic recording medium 80 with higher accuracy.

[0086] For example, the third voltage V3 (third signal) between the third terminal 53 and the sixth terminal 56 may be configured to change according to the magnetic field to be detected when a current flows between the first terminal 51 and the second terminal 52.

[0087] A fourth circuit 75d may be provided. The fourth circuit 75d may be configured, for example, to detect a third voltage V3 between the third terminal 53 and the sixth terminal 56. In an embodiment, information recorded on the magnetic recording medium 80 may be reproduced by processing at least two of the first voltage V1, the second voltage V2, and the third voltage V3.

[0088] In the magnetic heads 110a to 117a, the fourth voltage V4 between the first terminal 51 and the second terminal 52 may be configured to change in accordance with the magnetic field to be detected when a current flows between the first terminal 51 and the second terminal 52. In an embodiment, information recorded on the magnetic recording medium 80 may be reproduced by processing at least two of the first voltage V1, the second voltage V2, the third voltage V3, and the fourth voltage V4.

[0089] FIG. 18 is a schematic perspective view illustrating the magnetic head and the magnetic recording device according to the embodiment. As shown in FIG. 18 , a magnetic head according to the embodiment (e.g., magnetic head 110) includes a reproducing unit 70. The reproducing unit 70 includes a first reproducing element 70a. The reproducing unit 70 may further include other reproducing elements. The magnetic head 110 is used together with a magnetic recording medium 80. The magnetic head 110 may include a recording unit 90. The recording unit 90 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.

[0090] 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 a recording unit 90. The recording unit 90 includes, for example, a first magnetic pole 91 and a second magnetic pole 92. The first magnetic pole 91 is, for example, a main magnetic pole. The second magnetic pole 92 is, for example, a trailing shield. The recording unit 90 may include a recording element 93. The recording element 93 may include a magnetic field control element or a high-frequency oscillation element. The recording element 93 may be omitted.

[0091] The first reproducing element 70a of the reproducing unit 70 includes, for example, a first shield 41, a second shield 42, and a first magnetic member 11. The third shield 43 and the fourth shield 44 are omitted in Fig. 18. The reproducing unit 70 can output a signal according to the magnetization 83 of the magnetic recording layer 81.

[0092] 18, 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 by magnetic head 110 at any position. Information corresponding to magnetization 83 of magnetic recording layer 81 is reproduced by magnetic head 110 at any position.

[0093] For example, the medium movement direction 85 may be the direction from the first shield 41 to the second shield 42. For example, the magnetic recording medium 80 includes one recording area (first area). After the first area faces the first shield 41, the first area faces the second shield 42.

[0094] For example, the direction from the reproducing unit 70 to the recording unit 90 is along the first direction D1. For example, the second shield 42 is located between the first magnetic member 11 and the recording unit 90. For example, the second conductive member 62 is located between the first magnetic member 11 and the recording unit 90.

[0095] The magnetic recording device according to the embodiment includes the magnetic head (e.g., magnetic head 110), a magnetic recording medium 80, a first circuit 75a, a second circuit 75b, and a third circuit 75c. The reproducing unit 70 is configured to reproduce information recorded on the magnetic recording medium 80. One of the first circuit 75a and the second circuit 75b is configured to supply a current between the first terminal 51 and the second terminal 52. The other of the first circuit 75a and the second circuit 75b is configured to detect a first voltage V1 between the third terminal 53 and the fourth terminal 54. In one example, the third circuit 75c is configured to detect a second voltage V2 between the first terminal 51 and the fifth terminal 55. In another example, the third circuit 75c is configured to detect a second voltage V2 between the third terminal 53 and the fifth terminal 55.

[0096] For example, the reproducing unit 70 (first reproducing element 70a) faces the magnetic recording medium 80. The magnetic recording medium 80 may include a first recording area 80a and a second recording area 80b. The direction from the first recording area 80a to the second recording area 80b is along the first direction D1 or the second direction D2. The reproducing unit 70 may be configured to reproduce the state of the first recording area 80a and the state of the second recording area 80b.

[0097] The magnetic recording device may include a fourth circuit 75d. The fourth circuit 75d may be configured to detect, for example, a third voltage V3 between the third terminal 53 and the sixth terminal 56. In an embodiment, information recorded on the magnetic recording medium 80 may be reproduced by processing at least two of the first voltage V1, the second voltage V2, and the third voltage V3.

[0098] FIG. 19 is a schematic perspective view illustrating a part of the magnetic recording device according to the embodiment. FIG. 19 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.

[0099] 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.

[0100] FIG. 20 is a schematic perspective view illustrating the magnetic recording device according to the embodiment. 21A and 21B are schematic perspective views illustrating a part of the magnetic recording device according to the embodiment. The magnetic recording device may be a magnetic recording and reproducing device. As shown in FIG. 20, a rotary actuator is used in the magnetic recording device 150 according to the embodiment. The recording medium disk 180 is mounted on a spindle motor 180M. The recording medium disk 180 is rotated in the direction of the 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).

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] FIG. 21(a) is an enlarged perspective view of a head stack assembly 160, illustrating the configuration of a portion of the magnetic recording device. FIG. 21B 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.

[0106] 21(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.

[0107] As shown in FIG. 21( 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 .

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] The embodiments may include the following technical solutions. (Technical proposal 1) a reproducing unit including a first reproducing element; The first reproducing element is A first shield; A second shield; The third shield, a fourth shield, wherein a second direction from the third shield to the fourth shield intersects with a first direction from the first shield to the second shield; and a first magnetic member provided between the first shield and the second shield and between the third shield and the fourth shield, the first magnetic member including a first portion, a second portion, a third portion, and a fourth portion, the first portion being between the first shield and the second shield in the first direction, the second portion being between the first portion and the second shield in the first direction, the third portion being between the third shield and the fourth shield in the second direction, and the fourth portion being between the third portion and the fourth shield in the second direction; a first connecting conductive member electrically connected to the first magnetic member, wherein a direction from at least a portion of the first magnetic member to the first connecting conductive member is along a third direction intersecting a plane including the first direction and the second direction; a first terminal electrically connected to the first portion; a second terminal electrically connected to the second portion; a third terminal electrically connected to the third portion; a fourth terminal electrically connected to the fourth portion; a fifth terminal electrically connected to the first connecting conductive member; a magnetic head including:

[0115] (Technical proposal 2) The first reproducing element is a non-magnetic first conductive member provided between the first shield and the first magnetic member; a non-magnetic second conductive member provided between the first magnetic member and the second shield; further comprising the first conductive member electrically connects the first shield to the first portion; the second conductive member electrically connects the second shield to the second portion; the first terminal is electrically connected to the first portion via the first shield and the first conductive member; A magnetic head described in Technical Solution 1, wherein the second terminal is electrically connected to the second portion via the second shield and the second conductive member.

[0116] (Technical proposal 3) The first reproducing element is a non-magnetic third conductive member provided between the third shield and the first magnetic member; a non-magnetic fourth conductive member provided between the first magnetic member and the fourth shield; further comprising the third conductive member electrically connects the third shield to the third portion; the fourth conductive member electrically connects the fourth shield to the fourth portion; the third terminal is electrically connected to the third portion via the third shield and the third conductive member; A magnetic head described in Technical Solution 2, wherein the fourth terminal is electrically connected to the fourth portion via the fourth shield and the fourth conductive member.

[0117] (Technical proposal 4) A magnetic head described in Technical Solution 2 or 3, wherein the direction from the first conductive member to the first connecting conductive member intersects with the direction from the first conductive member to the second conductive member.

[0118] (Technical proposal 5) In the first direction, the third shield is located between a portion of the first shield and a portion of the second shield, The magnetic head according to any one of Technical Solutions 1 to 4, wherein the fourth shield is located between another part of the first shield and another part of the second shield in the first direction.

[0119] (Technical proposal 6) A magnetic head described in any one of technical proposals 1 to 5, wherein the first voltage between the first terminal and the second terminal is configured to change according to the magnetic field to be detected when a current flows between the third terminal and the fourth terminal.

[0120] (Technical proposal 7) A magnetic head as described in Technical Solution 6, wherein the second voltage between the first terminal and the fifth terminal is configured to change in accordance with the magnetic field to be detected when the current flows between the third terminal and the fourth terminal.

[0121] (Technical proposal 8) A magnetic head described in any one of technical proposals 1 to 5, wherein the first voltage between the third terminal and the fourth terminal is configured to change according to the magnetic field to be detected when a current flows between the first terminal and the second terminal.

[0122] (Technical proposal 9) A magnetic head as described in Technical Solution 8, wherein the second voltage between the third terminal and the fifth terminal is configured to change in accordance with the magnetic field to be detected when the current flows between the first terminal and the second terminal.

[0123] (Technical proposal 10) the first reproducing element faces a magnetic recording medium; the magnetic recording medium includes a first recording area and a second recording area, a direction from the first recording area to the second recording area is along the first direction or the second direction; The magnetic head according to any one of Technical Solutions 6 to 9, wherein the magnetic field to be detected depends on the state of the first recording area and the state of the second recording area.

[0124] (Technical proposal 11) The first reproducing element is a non-magnetic second connecting conductive member electrically connected to the first magnetic member; a sixth terminal electrically connected to the second connecting conductive member; further comprising The magnetic head according to any one of Technical Solutions 1 to 5, wherein a direction from the first connecting conductive member to the second connecting conductive member intersects with the third direction.

[0125] (Technical proposal 12) A magnetic head as described in Technical Proposal 11, wherein the third voltage between the first terminal and the sixth terminal is configured to change according to the magnetic field to be detected when a current flows between the third terminal and the fourth terminal.

[0126] (Technical proposal 13) A magnetic head as described in Technical Proposal 11, wherein the third voltage between the third terminal and the sixth terminal is configured to change according to the magnetic field to be detected when a current flows between the first terminal and the second terminal.

[0127] (Technical proposal 14) the first reproducing element faces a magnetic recording medium; the magnetic recording medium includes a first recording area and a second recording area, a direction from the first recording area to the second recording area is along the first direction or the second direction; The magnetic head according to Technical Solution 12 or 13, wherein the magnetic field to be detected depends on the state of the first recording area and the state of the second recording area.

[0128] (Technical proposal 15) The magnetic head according to any one of Technical Solutions 1 to 14, wherein the first connecting conductive member overlaps a portion of the first magnetic member in the third direction.

[0129] (Technical proposal 16) the first reproducing element further includes a second magnetic member; The magnetic head according to any one of Technical Solutions 1 to 5, wherein the direction from the first magnetic member to the second magnetic member is along the third direction.

[0130] (Technical proposal 17) The magnetic head according to any one of Technical Solutions 1 to 16, wherein the length of the first magnetic member along the third direction is longer than the length of the first magnetic member along the second direction.

[0131] (Technical proposal 18) The magnetic head described in any one of Technical Schemes 1 to 17, wherein the first magnetic member includes at least one selected from the group consisting of Co2MnGa, Co2MnAl, FePt, MnGa, Mn3Sn, Mn3Ge, Mn3Ga, RuO2, MnTe, CrSb, and Mn5Si3.

[0132] (Technical proposal 19) A magnetic head described in any one of technical proposals 1 to 18, wherein the first connecting conductive member includes at least one selected from the group consisting of Cu, Au, Ag, Pt, Al, Pd, Ta, Ru, Hf, W, Mo, Ir, Cr, Tb and Rh.

[0133] (Technical proposal 20) A magnetic head according to any one of technical proposals 1 to 9; a magnetic recording medium; Equipped with The magnetic recording device, wherein the reproducing section is capable of reproducing information recorded on the magnetic recording medium.

[0134] According to the embodiment, it is possible to provide a magnetic head and a magnetic recording device that can improve characteristics.

[0135] 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.

[0136] 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 shield, magnetic layer, conductive member, and terminals, 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.

[0137] 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.

[0138] In addition, all magnetic heads and magnetic recording devices that can be implemented by a person skilled in the art by appropriately modifying the design based on the magnetic heads and magnetic recording devices described above as embodiments of the present invention also fall within the scope of the present invention, as long as they include the gist of the present invention.

[0139] 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.

[0140] 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]

[0141] 11, 12: first and second magnetic members, 11a-11d: first to fourth portions, 31: first insulating member, 31a-31d: first to fourth insulating regions, 41-44: first to fourth shields, 41F-44F: first to fourth ends, 51-56: first to sixth terminals, 61-64: first to fourth conductive members, 68a, 68b: first and second connecting conductive members, 70: reproducing section, 70F: medium facing surface, 70a: first reproducing element, 75a-75d: first to fourth circuits, 80: magnetic recording medium, 80a, 80b: first and second recording regions, 81: magnetic recording layer, 82: medium substrate, 83: magnetization, 85: medium movement direction, 90: recording section, 91, 92: first and second magnetic poles, 93: recording element, 110-117, 110a-117a: magnetic head, 150: magnetic recording device, 154: suspension, 155: arm, 156: voice coil motor, 157: bearing, 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, AR: arrow, D1-D3: first to third directions, V1-V4: first to fourth voltages

Claims

1. a reproducing unit including a first reproducing element; The first reproducing element is A first shield; A second shield; and A third shield; and a fourth shield, wherein a second direction from the third shield to the fourth shield intersects with a first direction from the first shield to the second shield; and a first magnetic member provided between the first shield and the second shield and between the third shield and the fourth shield, the first magnetic member including a first portion, a second portion, a third portion, and a fourth portion, the first portion being between the first shield and the second shield in the first direction, the second portion being between the first portion and the second shield in the first direction, the third portion being between the third shield and the fourth shield in the second direction, and the fourth portion being between the third portion and the fourth shield in the second direction; a first connecting conductive member electrically connected to the first magnetic member, wherein a direction from at least a portion of the first magnetic member to the first connecting conductive member is along a third direction intersecting a plane including the first direction and the second direction; a first terminal electrically connected to the first portion; a second terminal electrically connected to the second portion; a third terminal electrically connected to the third portion; a fourth terminal electrically connected to the fourth portion; a fifth terminal electrically connected to the first connecting conductive member; a magnetic head including:

2. 2. The magnetic head according to claim 1, wherein a first voltage between the first terminal and the second terminal is configured to change in accordance with a magnetic field to be detected when a current flows between the third terminal and the fourth terminal.

3. 3. The magnetic head of claim 2, wherein the second voltage between the first terminal and the fifth terminal is configured to change in accordance with the magnetic field to be detected when the current flows between the third terminal and the fourth terminal.

4. 2. The magnetic head according to claim 1, wherein a first voltage between the third terminal and the fourth terminal is configured to change in accordance with a magnetic field to be detected when a current flows between the first terminal and the second terminal.

5. 5. The magnetic head of claim 4, wherein the second voltage between the third terminal and the fifth terminal is configured to change in accordance with the magnetic field to be detected when the current flows between the first terminal and the second terminal.

6. The first reproducing element is a non-magnetic second connecting conductive member electrically connected to the first magnetic member; a sixth terminal electrically connected to the second connecting conductive member; further comprising 2. The magnetic head according to claim 1, wherein a direction from the first connecting conductive member to the second connecting conductive member intersects with the third direction.

7. 7. The magnetic head of claim 6, wherein the third voltage between the first terminal and the sixth terminal is configured to change in accordance with a magnetic field to be detected when a current flows between the third terminal and the fourth terminal.

8. 7. The magnetic head of claim 6, wherein a third voltage between the third terminal and the sixth terminal is configured to change in response to a magnetic field to be detected when a current flows between the first terminal and the second terminal.

9. the first reproducing element further includes a second magnetic member; 2. The magnetic head according to claim 1, wherein the direction from the first magnetic member to the second magnetic member is along the third direction.

10. A magnetic head according to any one of claims 1 to 5, a magnetic recording medium; Equipped with The magnetic recording device, wherein the reproducing section is capable of reproducing information recorded on the magnetic recording medium.

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