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, and first and second conductive members. A second direction from the third shield toward the fourth shield crosses a first direction from the first shield toward the second shield. The first magnetic member is provided between the first and second shields and between the third and fourth shields. The first conductive member is nonmagnetic and is provided between the first shield and the first magnetic member. The second conductive member is nonmagnetic and is provided between the first magnetic member and the second shield. The first shield includes a first end. The second shield includes a second end. A distance between the first end portion and the first conductive member in a third direction is longer than a distance between the second end portion and the second conductive member in the third direction.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 conductive member, and a second conductive member. 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 provided between the first shield and the second shield and between the third shield and the fourth shield. The first conductive member is provided between the first shield and the first magnetic member and is nonmagnetic. The second conductive member is provided between the first magnetic member and the second shield and is nonmagnetic. The first shield includes a first end corresponding to the medium facing surface. The second shield includes a second end corresponding to the medium facing surface. A first distance between the first end and the first conductive member in a third direction intersecting a plane including the first direction and the second direction is longer than a second distance between the second end and the second conductive member in the third direction. [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] 3A and 3B are schematic views illustrating the magnetic head according to the second embodiment. [Figure 4] FIG. 4 is a schematic cross-sectional view illustrating the magnetic head according to the second embodiment. [Figure 5] FIG. 5 is a schematic cross-sectional view illustrating the magnetic head according to the second embodiment. [Figure 6] FIG. 6 is a schematic cross-sectional view illustrating the magnetic head according to the second embodiment. [Figure 7] FIG. 7 is a schematic cross-sectional view illustrating the magnetic head according to the second embodiment. [Figure 8]8A and 8B are schematic views illustrating the magnetic head according to the second embodiment. [Figure 9] FIG. 9 is a schematic cross-sectional view illustrating the magnetic head according to the second embodiment. [Figure 10] 10A and 10B are schematic views illustrating the magnetic head according to the third embodiment. [Figure 11] 11(a) and 11(b) are graphs illustrating the characteristics of the magnetic head. [Figure 12] FIG. 12 is a schematic perspective view illustrating the magnetic head and the magnetic recording device according to the embodiment. [Figure 13] FIG. 13 is a schematic perspective view illustrating a part of the magnetic recording device according to the embodiment. [Figure 14] FIG. 14 is a schematic perspective view illustrating the magnetic recording device according to the embodiment. [Figure 15] 15A and 15B 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 A1-A2 in Fig. 1(a), and Fig. 2 is a cross-sectional view taken along line A3-A4 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 conductive member 61, and a second conductive member 62.

[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. The first conductive member 61 is provided between the first shield 41 and the first magnetic member 11. The first conductive member 61 is 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 is non-magnetic.

[0013] As shown in Fig. 1(b), the first reproducing element 70a includes a medium facing surface 70F. The medium facing surface 70F faces a magnetic recording medium from which information is reproduced by the magnetic head 110. Fig. 1(a) corresponds to a plan view of the first reproducing element 70a, looking at the medium facing surface 70F.

[0014] 1(b), 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.

[0015] As shown in FIG. 1(b), the first distance d1 between the first end 41F and the first conductive member 61 in the third direction D3 is longer than the second distance d2 between the second end 42F and the second conductive member 62 in 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. The second distance d2 may be zero. The position of the second conductive member 62 in the height direction is different from the position of the first conductive member 61 in the height direction.

[0016] 1(a), in one example, the first reproducing element 70a includes a first terminal 51, a second terminal 52, a third terminal 53, and a fourth terminal 54. The first terminal 51 is electrically connected to the first shield 41. The second terminal 52 is electrically connected to the second shield 42. The third terminal 53 is electrically connected to the third shield 43. The fourth terminal 54 is electrically connected to the fourth shield 44.

[0017] For example, a first circuit 75a and a second circuit 75b may be provided. The first circuit 75a is electrically connected to the first terminal 51 and the second terminal 52. The second circuit 75b is electrically connected to the third terminal 53 and the fourth terminal 54. In one example, the second circuit 75b supplies a current between the third terminal 53 and the fourth terminal 54. The current passes through the third shield 43, the first magnetic member 11, and the fourth shield 44. At this time, for example, the voltage between the first terminal 51 and the second terminal 52 changes depending on the magnetic field to be detected. The change in voltage is thought to be caused by, for example, the anomalous Hall effect.

[0018] The change in voltage is detected by the first circuit 75a. This allows the magnetic field to be detected. In this way, when a current flows between the third terminal 53 and the fourth terminal 54, the voltage between the first terminal 51 and the second terminal 52 can change depending on the magnetic field to be detected. The magnetic field to be detected is based on, for example, information recorded on a magnetic recording medium.

[0019] In the embodiment, the first circuit 75a and the second circuit 75b may be considered to be included in the magnetic head 110 for convenience. The first circuit 75a and the second circuit 75b may be provided separately from the magnetic head 110. These circuits may be included in the magnetic recording device. The first circuit 75a includes, for example, a voltmeter. The second circuit 75b includes, for example, a current source.

[0020] As described above, in the embodiment, the position of the second conductive member 62 in the height direction is different from the position of the first conductive member 61 in the height direction. The first distance d1 between the first end 41F and the first conductive member 61 in the third direction D3 is longer than the second distance d2 between the second end 42F and the second conductive member 62 in the third direction D3. With this configuration, the direction connecting the first conductive member 61 and the second conductive member 62 is inclined with respect to the XY plane.

[0021] For example, the voltage generated between the first conductive member 61 and the second conductive member 62 corresponds to a component in a direction intersecting (e.g., inclined) the third direction D3 of the magnetization in the first magnetic member 11. For example, the voltage generated between the first conductive member 61 and the second conductive member 62 corresponds to the sum of a component along the third direction D3 of the magnetization in the first magnetic member 11 and a component along the first direction D1.

[0022] For example, the magnetic recording medium may be a perpendicular magnetic recording medium. The magnetic recording medium includes a first recording area and a second recording area. These recording areas are adjacent to each other in a down-track direction (e.g., a first direction D1). When the magnetization direction of the first recording area and the magnetization direction of the second recording area are different from each other, the magnetic fields emitted from these recording areas include a component tilted with respect to a third direction D3. The magnetic fields emitted from these recording areas include, for example, a component along the first direction D1. The component tilted with respect to the third direction D3 changes significantly at the boundary between the first recording area and the second recording area.

[0023] In the embodiment, the direction connecting the first conductive member 61 and the second conductive member 62 is inclined with respect to the XY plane. As a result, the signals obtained from these conductive members change with higher sensitivity in accordance with the gradient components of the magnetic fields emitted from the two recording regions of the magnetic recording medium. In the embodiment, high-sensitivity detection is possible. This allows for higher recording density. According to the embodiment, a magnetic head capable of improving characteristics can be provided.

[0024] For example, when the magnetization in the first recording area and the second recording area is reversed, the magnetization near the boundary between them contains a tilted component. The signals obtained from the first conductive member 61 and the second conductive member 62 change with higher sensitivity in accordance with the tilted component accompanying the magnetization reversal. This allows for high-sensitivity detection and high recording density.

[0025] In an embodiment, a current may be supplied between the first terminal 51 and the second terminal 52, and the voltage between the third terminal 53 and the fourth terminal 54 may vary depending on the magnetic field to be detected. In this case, the signals obtained from the two conductive members vary with higher sensitivity depending on the gradient components of the magnetic fields emitted from the two recording areas of the magnetic recording medium. Higher sensitivity detection is possible. Higher recording density can be achieved.

[0026] In this way, the first reproducing element 70a may be configured to satisfy the first condition or the second condition. In the first condition, when a current flows between the third terminal 53 and the fourth terminal 54, the voltage between the first terminal 51 and the second terminal 52 changes in accordance with the magnetic field to be detected. In the second condition, when a current flows between the first terminal 51 and the second terminal 52, the voltage between the third terminal 53 and the fourth terminal 54 changes in accordance with the magnetic field to be detected.

[0027] 1(b), in this example, the second conductive member 62 does not overlap with the first conductive member 61 in the first direction D1. This allows for more effective detection of the tilted component of the magnetic field emitted from the magnetic recording medium.

[0028] As described above, 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.

[0029] 1(a), 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 and is nonmagnetic. The fourth conductive member 64 is provided between the first magnetic member 11 and the fourth shield 44 and is nonmagnetic.

[0030] In one example, at least one of the first conductive member 61, the second conductive member 62, the third conductive member 63, and the fourth conductive member 64 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.

[0031] The first conductive member 61 may be in contact with the first magnetic member 11. The second conductive member 62 may be in contact with the first magnetic member 11. The first conductive member 61 may be in contact with the first shield 41. The second conductive member 62 may be in contact with the second shield 42.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 1, 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.

[0037] 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.

[0038] (Second embodiment) 3A and 3B are schematic views illustrating the magnetic head according to the second embodiment. Fig. 3(a) is a plan view, and Fig. 3(b) is a cross-sectional view taken along line A1-A2 in Fig. 3(a). 3A, in the magnetic head 120 according to the embodiment, the configuration of the second conductive member 62 is different from that in the magnetic head 110. The remaining configuration of the magnetic head 120 may be the same as that of the magnetic head 110. For example, the configuration of the cross section taken along line A3-A4 in FIG. 3A may be the same as the configuration illustrated in FIG.

[0039] 3A, the magnetic head 120 according to the embodiment also includes a reproducing section 70 including 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 conductive member 61, and a second conductive member 62.

[0040] A second direction D2 from the third shield 43 to the fourth shield 44 intersects with a first direction D1 from the first shield 41 to the second shield 42. 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.

[0041] 3(b), the first conductive member 61 is electrically connected to the first portion 11a of the first magnetic member 11. The first conductive member 61 is non-magnetic. The second conductive member 62 is electrically connected to the second portion 11b of the first magnetic member 11. The second conductive member 62 is non-magnetic.

[0042] The first position of the first portion 11a in the first direction D1 is between the position of the first shield 41 in the first direction D1 and the second shield position of the second shield 42 in the first direction D1. The second position of the second portion 11b in the first direction D1 is between the first position and the second shield position. The first portion 11a and the second portion 11b are provided at different positions from each other in the first direction D1.

[0043] 3(b), the first conductive member 61 includes a first conductive portion 61a. The first shield 41 includes a first end portion 41F corresponding to the medium facing surface 70F. The second shield 42 includes a second end portion 42F corresponding to the medium facing surface 70F. The distance between the first end portion 41F and the first conductive portion 61a in a third direction D3 that intersects with a plane including the first direction D1 and the second direction D2 is defined as a first distance d1. The distance between the second end portion 42F and the second conductive member 62 in the third direction D3 is defined as a second distance d2. The first distance d1 is longer than the second distance d2.

[0044] In the magnetic head 120, the direction connecting the first portion 11a and the second portion 11b is inclined with respect to the XY plane. For example, the voltage generated between the first conductive portion 61a and the second conductive member 62 corresponds to the component of the magnetization in the first magnetic member 11 that is inclined with respect to the third direction D3. The signals obtained from these conductive members change with higher sensitivity in accordance with the inclined components of the magnetic fields emitted from the two recording regions of the magnetic recording medium. Highly sensitive detection is possible. Higher recording density can be obtained. A magnetic head with improved characteristics can be provided.

[0045] In this example, the first conductive member 61 (first conductive portion 61a) is electrically connected to the first shield 41. In this case, the first terminal 51 may be electrically connected to the first shield 41. The second terminal 52 is electrically connected to the second conductive member 62 via the second shield 42. As will be described later, the first conductive member 61 (first conductive portion 61a) does not have to be electrically connected to the first shield 41. In this case, the first terminal 51 is electrically connected to the first conductive member 61 (first conductive portion 61a).

[0046] In the magnetic head 120, the first reproducing element 70a may include a first terminal 51 electrically connected to the first conductive member 61, a second terminal 52 electrically connected to the second shield 42, a third terminal 53 electrically connected to the third shield 43, and a fourth terminal 54 electrically connected to the fourth shield 44.

[0047] The first reproducing element 70a may be configured to satisfy a first condition or a second condition. In the first condition, when a current flows between the third terminal 53 and the fourth terminal 54, the voltage between the first terminal 51 and the second terminal 52 changes in accordance with the magnetic field to be detected. In the second condition, when a current flows between the first terminal 51 and the second terminal 52, the voltage between the third terminal 53 and the fourth terminal 54 changes in accordance with the magnetic field to be detected.

[0048] 3(a), in the first direction D1, the third shield 43 may be provided 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 may be provided between another part of the first shield 41 and another part of the second shield 42.

[0049] In the magnetic head 120, the above-mentioned first insulating member 31 may be provided.

[0050] FIG. 4 is a schematic cross-sectional view illustrating the magnetic head according to the second embodiment. FIG. 4 is a cross-sectional view corresponding to the line A1-A2 in FIG. 4, in the magnetic head 121 according to the embodiment, the first conductive member 61 further includes a second conductive portion 61b. Except for this, the configuration of the magnetic head 121 may be the same as the configuration of the magnetic head 120.

[0051] In the magnetic head 121, the first conductive member 61 includes a second conductive portion 61b in addition to the first conductive portion 61a. The second conductive portion 61b is connected to the first conductive portion 61a. The second conductive portion 61b is provided between at least a portion of the first shield 41 and at least a portion of the first magnetic member 11 in the first direction D1. In the magnetic head 121, too, the signal generated between the first conductive member 61 and the second conductive member 62 changes with higher sensitivity in accordance with the tilted components of the magnetic fields emitted from the two recording regions of the magnetic recording medium. The tilted components of magnetization can be detected with high sensitivity. High-sensitivity detection is possible.

[0052] FIG. 5 is a schematic cross-sectional view illustrating the magnetic head according to the second embodiment. FIG. 5 is a cross-sectional view corresponding to the line A1-A2 in FIG. 5, in the magnetic head 122 according to the embodiment, the configuration of the second conductive portion 61b is different from that in the magnetic head 121. Except for this, the configuration of the magnetic head 122 may be the same as the configuration of the magnetic head 121.

[0053] In the magnetic head 122, the second conductive portion 61b overlaps with the first end 41F. The magnetic head 122 can also detect the tilted component of magnetization with high sensitivity.

[0054] FIG. 6 is a schematic cross-sectional view illustrating the magnetic head according to the second embodiment. FIG. 6 is a cross-sectional view corresponding to the line A1-A2 in FIG. 6, in a magnetic head 123 according to the embodiment, the configuration of the first shield 41 is different from that in the magnetic head 120. Except for this, the configuration of the magnetic head 123 may be the same as the configuration of the magnetic head 120.

[0055] In the magnetic head 123, at least a part of the first conductive portion 61a is located in the third direction D3 between the first magnetic member 11 and a part of the first shield 41. The magnetic head 123 can also detect the tilted component of magnetization with high sensitivity.

[0056] FIG. 7 is a schematic cross-sectional view illustrating the magnetic head according to the second embodiment. FIG. 7 is a cross-sectional view corresponding to the line A1-A2 in FIG. 7, in a magnetic head 124 according to the embodiment, the configurations of the first shield 41 and the second conductive portion 61b are different from those in the magnetic head 121. Except for this, the configuration of the magnetic head 124 may be the same as the configuration of the magnetic head 121.

[0057] In the magnetic head 124, at least a portion of the first conductive portion 61a is located in the third direction D3 between the first magnetic member 11 and a portion of the first shield 41. The second conductive portion 61b is located in the first direction D1 between at least a portion of the first shield 41 and at least a portion of the first magnetic member 11. The magnetic head 124 can also detect the tilted component of magnetization with high sensitivity.

[0058] 8A and 8B are schematic views illustrating the magnetic head according to the second embodiment. Fig. 8(a) is a plan view, and Fig. 8(b) is a cross-sectional view taken along line A1-A2 in Fig. 8(a). 8(a), in the magnetic head 125 according to the embodiment, the configuration of the first conductive member 61 is different from that in the magnetic head 110. The remaining configuration of the magnetic head 125 may be the same as that of the magnetic head 110. For example, the configuration of the cross section taken along line A3-A4 in FIG. 8(a) may be the same as the configuration illustrated in FIG.

[0059] In the magnetic head 125, the first conductive member 61 (first conductive portion 61a) is not electrically connected to the first shield 41. The first terminal 51 is electrically connected to the first conductive member 61 (first conductive portion 61a). The second terminal 52 is electrically connected to the second shield 42. The magnetic head 125 can also detect the tilted component of magnetization with high sensitivity.

[0060] FIG. 9 is a schematic cross-sectional view illustrating the magnetic head according to the second embodiment. 9, in the magnetic head 126 according to the embodiment, the first reproducing element 70a includes the second magnetic member 12. The configuration of the magnetic head 126 other than this may be the same as the configuration of the magnetic head 125.

[0061] In the magnetic head 126, the first reproducing element 70a further 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. In the third direction D3, the first conductive member 61 (first conductive portion 61a) may be provided between the first magnetic member 11 and the second magnetic member 12.

[0062] The second magnetic member 12 may include, for example, IrMn. The second magnetic member 12 appropriately controls the magnetization of the first magnetic member 11. For example, the magnetization of the first magnetic member 11 includes a component along the third direction D3. For example, higher sensitivity can be obtained. Higher recording density can be obtained.

[0063] (Third embodiment) 10A and 10B are schematic views illustrating the magnetic head according to the third embodiment. Fig. 10(a) is a plan view, and Fig. 10(b) is a cross-sectional view taken along line A1-A2 of Fig. 10(a). 10(a), in the magnetic head 130 according to the embodiment, the configuration of the conductive member is different from that in the magnetic head 110. The remaining configuration of the magnetic head 130 may be the same as that of the magnetic head 110. For example, the configuration of the cross section taken along line A3-A4 in FIG. 10(a) may be the same as the configuration illustrated in FIG.

[0064] The magnetic head 130 also includes a reproducing section 70 that 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 conductive member 61, and a second conductive member 62.

[0065] A second direction D2 from the third shield 43 to the fourth shield 44 intersects with a first direction D1 from the first shield 41 to the second shield 42. 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. The first conductive member 61 is provided between the first magnetic member 11 and the first shield 41 and is nonmagnetic. The second conductive member 62 is provided between the first magnetic member 11 and the second shield 42 and is nonmagnetic.

[0066] The first conductive member 61 includes a first surface 61f facing the first magnetic member 11. The second conductive member 62 includes a second surface 62f facing the first magnetic member 11. The first surface 61f includes a first center 61c in a third direction D3 that intersects with a plane including the first direction D1 and the second direction D2. The second surface 62f includes a second center 62c in the third direction D3.

[0067] 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. A first distance d1 in the third direction D3 between the first end 41F and the first center 61c is longer than a second distance d2 in the third direction D3 between the second end 42F and the second center 62c.

[0068] The first line Ln1 passing through the first center 61c and the second center 62c is inclined with respect to the XY plane. With this configuration, the signal generated between the first conductive member 61 and the second conductive member 62 changes with higher sensitivity in response to the inclined components of the magnetic fields emitted from the two recording regions of the magnetic recording medium.

[0069] In the embodiment, the first angle θ1 between the first straight line Ln1 and the first direction D1 is 15 degrees or more and 80 degrees or less. The clearly inclined first straight line Ln1 allows the inclined component of the magnetic field to be effectively detected. The first angle θ1 may be 25 degrees or more and 80 degrees or less. The first angle θ1 may be 35 degrees or more and 80 degrees or less.

[0070] 10(b), the position of the first center 61c in the third direction D3 is higher than the position of the second center 62c in the third direction D3, so that the effective electric field generated between the first surface 61f and the second surface 62f is inclined with respect to the first direction D1. As a result, the signal generated between the first conductive member 61 and the second conductive member 62 changes with higher sensitivity in accordance with the inclined components of the magnetic fields emitted from the two recording regions of the magnetic recording medium.

[0071] 11(a) and 11(b) are graphs illustrating the characteristics of the magnetic head. These figures illustrate simulation results of the reproduction characteristics when the first angle θ1 is changed. The horizontal axis of these figures is the first angle θ1. The vertical axis of FIG. 11(a) is the first evaluation parameter PV1. The first evaluation parameter PV1 corresponds to the level of noise in the reproduction signal over a relatively short period (in this example, a period of 2T). It is preferable that the first evaluation parameter PV1 is large. When the first evaluation parameter PV1 is large, the noise is small.

[0072] 11(a), when the first angle θ1 is 15 degrees or more, a large first evaluation parameter PV1 is obtained. When the first angle θ1 is 25 degrees or more, an even larger first evaluation parameter PV1 is obtained. When the first angle θ1 is 15 degrees or more, the change in the first evaluation parameter PV1 is critical.

[0073] The vertical axis of Figure 11(b) is the second evaluation parameter PV2. The second evaluation parameter PV2 corresponds to the level of noise in the reproduced signal over a relatively long period (in this example, a period of 6T). It is preferable that the second evaluation parameter PV2 is large. When the second evaluation parameter PV2 is large, the noise is small.

[0074] 11(b), when the first angle θ1 exceeds 80 degrees, the second evaluation parameter PV2 drops sharply. The first angle θ1 is preferably equal to or smaller than 80 degrees. When the first angle θ1 is equal to or larger than 35 degrees, a sufficiently large second evaluation parameter PV2 is obtained.

[0075] 11(a) and 11(b), it is preferable that the first angle θ1 be equal to or greater than 15 degrees and equal to or less than 80 degrees. It is more preferable that the first angle θ1 be equal to or greater than 35 degrees and equal to or less than 80 degrees.

[0076] For example, the thickness of the second conductive member 62 in the first direction D1 may be thinner than the thickness of the first conductive member 61 in the first direction. The resistance of the second conductive member 62 in the first direction D1 is reduced. For example, it becomes easier to detect signals passing through the second conductive member 62. It becomes easier to detect signals generated between the first conductive member 61 and the second conductive member 62.

[0077] FIG. 12 is a schematic perspective view illustrating the magnetic head and the magnetic recording device according to the embodiment. As shown in FIG. 12 , a magnetic head according to an 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.

[0078] 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.

[0079] 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. 12. The reproducing unit 70 can output a signal according to the magnetization 83 of the magnetic recording layer 81.

[0080] 12, 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.

[0081] For example, the medium movement direction 85 is 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.

[0082] In the embodiment, 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.

[0083] FIG. 13 is a schematic perspective view illustrating a part of the magnetic recording device according to the embodiment. FIG. 13 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.

[0084] 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.

[0085] FIG. 14 is a schematic perspective view illustrating the magnetic recording device according to the embodiment. 15A and 15B 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. 14, 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).

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] FIG. 15(a) is an enlarged perspective view of a head stack assembly 160, illustrating the configuration of a portion of the magnetic recording device. FIG. 15B 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.

[0091] 15(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 head gimbal assembly 158. The support frame 161 supports a coil 162 of the voice coil motor 156.

[0092] As shown in FIG. 15( 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 .

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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; 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; Including, the first shield includes a first end portion corresponding to the medium facing surface; the second shield includes a second end corresponding to the medium facing surface; A magnetic head, wherein a first distance between the first end and the first conductive member in a third direction intersecting a plane including the first direction and the second direction is longer than a second distance between the second end and the second conductive member in the third direction.

[0100] (Technical proposal 2) A magnetic head described in Technical Solution 1, wherein the second conductive member does not overlap with the first conductive member in the first direction.

[0101] (Technical proposal 3) In the first direction, the third shield is located between a portion of the first shield and a portion of the second shield, A magnetic head according to technical proposal 1 or 2, wherein in the first direction, the fourth shield is located between another part of the first shield and another part of the second shield.

[0102] (Technical proposal 4) the first conductive member is in contact with the first magnetic member, The magnetic head according to any one of Technical Solutions 1 to 3, wherein the second conductive member is in contact with the first magnetic member.

[0103] (Technical proposal 5) The playback unit a first terminal electrically connected to the first shield; a second terminal electrically connected to the second shield; a third terminal electrically connected to the third shield; a fourth terminal electrically connected to the fourth shield; The magnetic head according to any one of Technical Solutions 1 to 4, further comprising:

[0104] (Technical proposal 6) the first reproducing element is configured to satisfy a first condition or a second condition; Under the first condition, when a current flows between the third terminal and the fourth terminal, a voltage between the first terminal and the second terminal changes in accordance with a magnetic field to be detected, A magnetic head described in Technical Proposal 5, wherein, under the second condition, when a current flows between the first terminal and the second terminal, the voltage between the third terminal and the fourth terminal changes according to the magnetic field to be detected.

[0105] (Technical proposal 7) 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; a first non-magnetic conductive member electrically connected to a first portion of the first magnetic member; a non-magnetic second conductive member electrically connected to the second portion of the first magnetic member; Including, a first position of the first portion in the first direction is between a position of the first shield in the first direction and a second shield position of the second shield in the first direction; a second position of the second portion in the first direction is between the first position and the second shield position; the first conductive member includes a first conductive portion; the first shield includes a first end portion corresponding to the medium facing surface; the second shield includes a second end corresponding to the medium facing surface; A magnetic head, wherein a first distance between the first end and the first conductive portion in a third direction intersecting a plane including the first direction and the second direction is longer than a second distance between the second end and the second conductive member in the third direction.

[0106] (Technical proposal 8) the first conductive member includes a second conductive portion; the second conductive portion is connected to the first conductive portion; A magnetic head described in Technical Solution 7, wherein the second conductive portion is provided between at least a portion of the first shield and at least a portion of the first magnetic member in the first direction.

[0107] (Technical proposal 9) 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 described in Technical Solution 7 or 8, wherein in the first direction, the fourth shield is located between another part of the first shield and another part of the second shield.

[0108] (Technical proposal 10) The first reproducing element is a first terminal electrically connected to the first conductive portion; a second terminal electrically connected to the second shield; a third terminal electrically connected to the third shield; a fourth terminal electrically connected to the fourth shield; The magnetic head according to any one of Technical Solutions 7 to 9, further comprising:

[0109] (Technical proposal 11) the first reproducing element is configured to satisfy a first condition or a second condition; Under the first condition, when a current flows between the third terminal and the fourth terminal, a voltage between the first terminal and the second terminal changes in accordance with a magnetic field to be detected, A magnetic head described in Technical Proposal 10, wherein, under the second condition, when a current flows between the first terminal and the second terminal, the voltage between the third terminal and the fourth terminal changes according to the magnetic field to be detected.

[0110] (Technical proposal 12) The magnetic head according to any one of Technical Solutions 7 to 11, wherein at least a portion of the first conductive portion is located between the first magnetic member and a portion of the first shield in the third direction.

[0111] (Technical proposal 13) the first reproducing element further includes a second magnetic member; The magnetic head according to any one of Technical Solutions 7 to 12, wherein the direction from the first magnetic member to the second magnetic member is along the third direction.

[0112] (Technical proposal 14) 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; a non-magnetic first conductive member provided between the first magnetic member and the first shield; a non-magnetic second conductive member provided between the first magnetic member and the second shield; Including, the first conductive member includes a first surface facing the first magnetic member; the second conductive member includes a second surface facing the first magnetic member, the first surface includes a first center in a third direction intersecting a plane including the first direction and the second direction; the second surface includes a second center in the third direction, the first shield includes a first end portion corresponding to the medium facing surface; the second shield includes a second end corresponding to the medium facing surface; a first distance in the third direction between the first end and the first center is longer than a second distance in the third direction between the second end and the second center; a first angle between a first line passing through the first center and the second center and the first direction is equal to or greater than 15 degrees and equal to or less than 80 degrees;

[0113] (Technical proposal 15) The magnetic head described in Technical Solution 14, wherein the first angle is greater than or equal to 35 degrees and less than or equal to 80 degrees.

[0114] (Technical proposal 16) The first reproducing element is a first terminal electrically connected to the first shield; a second terminal electrically connected to the second shield; a third terminal electrically connected to the third shield; a fourth terminal electrically connected to the fourth shield; further comprising the first reproducing element is configured to satisfy a first condition or a second condition; Under the first condition, when a current flows between the third terminal and the fourth terminal, a voltage between the first terminal and the second terminal changes in accordance with a magnetic field to be detected, A magnetic head described in Technical Proposal 14 or 15, wherein, under the second condition, when a current flows between the first terminal and the second terminal, the voltage between the third terminal and the fourth terminal changes according to the magnetic field to be detected.

[0115] (Technical proposal 17) Further comprising a recording unit, The magnetic head according to any one of Technical Solutions 1 to 16, wherein the second shield is located between the first magnetic member and the recording unit.

[0116] (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.

[0117] (Technical proposal 19) A magnetic head according to any one of technical proposals 1 to 18; 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.

[0118] (Technical proposal 20) the magnetic recording medium includes a first area; The magnetic recording device according to Technical Solution 19, wherein after the first region faces the first shield, the first region faces the second shield.

[0119] According to the embodiment, it is possible to provide a magnetic head and a magnetic recording device that can improve characteristics.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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]

[0126] 11, 12: first and second magnetic members, 11a, 11b: first and second portions, 31: first insulating member, 31a-31d: first insulating region, 41-44: first to fourth shields, 41F, 42F: first and second ends, 51-54: first to fourth terminals, 61-64: first to fourth conductive members, 61a, 61b: first and second conductive portions, 61c, 62c: first and second centers, 61f, 62f: first and second surfaces, 70: reproducing section, 70F: medium facing surface, 70a: first reproducing element, 75a, 75b: first and second circuits, 80: magnetic recording medium, 81: magnetic recording layer, 82: medium substrate, 83: magnetization, 85: medium movement direction 90: recording unit, 91, 92: first and second magnetic poles, 93: recording element, 110, 120 to 126, 130: 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 to D3: first to third directions, Ln1: first straight line, PV1, PV2: first and second evaluation parameters, d1, d2: first and second distances, θ1: 1st angle

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; 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; Including, the first shield includes a first end corresponding to the medium facing surface; the second shield includes a second end portion corresponding to the medium facing surface; A magnetic head, wherein a first distance between the first end and the first conductive member in a third direction intersecting a plane including the first direction and the second direction is longer than a second distance between the second end and the second conductive member in the third direction.

2. The playback unit a first terminal electrically connected to the first shield; a second terminal electrically connected to the second shield; a third terminal electrically connected to the third shield; a fourth terminal electrically connected to the fourth shield; The magnetic head of claim 1 further comprising:

3. the first reproducing element is configured to satisfy a first condition or a second condition; Under the first condition, when a current flows between the third terminal and the fourth terminal, a voltage between the first terminal and the second terminal changes in accordance with a magnetic field to be detected, 3. The magnetic head according to claim 2, wherein, under the second condition, when a current flows between the first terminal and the second terminal, the voltage between the third terminal and the fourth terminal changes according to the magnetic field to be detected.

4. 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; a first non-magnetic conductive member electrically connected to a first portion of the first magnetic member; a second non-magnetic conductive member electrically connected to the second portion of the first magnetic member; Including, a first position of the first portion in the first direction is between a position of the first shield in the first direction and a second shield position of the second shield in the first direction; a second position of the second portion in the first direction between the first position and the second shield position; the first conductive member includes a first conductive portion; the first shield includes a first end corresponding to the medium facing surface; the second shield includes a second end portion corresponding to the medium facing surface; A magnetic head, wherein a first distance between the first end and the first conductive portion in a third direction intersecting a plane including the first direction and the second direction is longer than a second distance between the second end and the second conductive member in the third direction.

5. The first reproducing element is a first terminal electrically connected to the first conductive portion; a second terminal electrically connected to the second shield; a third terminal electrically connected to the third shield; a fourth terminal electrically connected to the fourth shield; 5. The magnetic head of claim 4, further comprising:

6. the first reproducing element is configured to satisfy a first condition or a second condition; Under the first condition, when a current flows between the third terminal and the fourth terminal, a voltage between the first terminal and the second terminal changes in accordance with a magnetic field to be detected, 6. The magnetic head according to claim 5, wherein, under the second condition, when a current flows between the first terminal and the second terminal, the voltage between the third terminal and the fourth terminal changes according to the magnetic field to be detected.

7. 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; a first non-magnetic conductive member provided between the first magnetic member and the first shield; a non-magnetic second conductive member provided between the first magnetic member and the second shield; Including, the first conductive member includes a first surface facing the first magnetic member, the second conductive member includes a second surface facing the first magnetic member, the first surface includes a first center in a third direction intersecting a plane including the first direction and the second direction; the second surface includes a second center in the third direction, the first shield includes a first end corresponding to the medium facing surface; the second shield includes a second end portion corresponding to the medium facing surface; a first distance in the third direction between the first end and the first center is longer than a second distance in the third direction between the second end and the second center; a first angle between a first line passing through the first center and the second center and the first direction is equal to or greater than 15 degrees and equal to or less than 80 degrees;

8. Further comprising a recording unit, The magnetic head according to claim 1 , wherein the second shield is located between the first magnetic member and the recording portion.

9. A magnetic head according to any one of claims 1 to 8, 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.

10. the magnetic recording medium includes a first area; The magnetic recording device according to claim 9 , wherein the first region faces the second shield after the first region faces the first shield.

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