JP2017157263A - Magnetic recording head and magnetic recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic recording head capable of improving recording density, and a magnetic recorder.SOLUTION: According to one embodiment, a magnetic recording head includes a first shield, a second shield, a magnetic pole, a first insulation part, and a first intermediate layer. The second shield is separated from the first shield in a first direction. The magnetic pole is provided between the first shield and the second shield. The magnetic pole includes a first end portion and a second end portion separated from the first end portion in a second direction intersecting with the first direction. A first end portion length along the first direction of the first end portion is longer than a second end portion length along the first direction of the second end portion. The first insulation part is provided between the first shield and the magnetic pole. The first intermediate layer is provided between the first shield and the first insulation part, and contains at least any one of Pt and Pd.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a magnetic recording head and a magnetic recording apparatus.

  Information is recorded on a magnetic storage medium such as an HDD (Hard Disk Drive) using a magnetic recording head. For example, perpendicular magnetic recording is advantageous for high density recording. In a magnetic recording head and a magnetic recording apparatus, improvement in recording density is desired.

JP 2011-227987 A

  Embodiments of the present invention provide a magnetic recording head and a magnetic recording apparatus that can improve recording density.

  According to an embodiment of the present invention, the magnetic recording head includes a first shield, a second shield, a magnetic pole, a first insulating portion, and a first intermediate layer. The second shield is separated from the first shield in the first direction. The magnetic pole is provided between the first shield and the second shield. The magnetic pole includes a first end and a second end spaced from the first end in a second direction intersecting the first direction. The first end length of the first end portion along the first direction is longer than the second end portion length of the second end portion along the first direction. The first insulating portion is provided between the first shield and the magnetic pole. The first intermediate layer is provided between the first shield and the first insulating portion, and includes at least one of Pt and Pd.

1 is a schematic plan view illustrating a magnetic recording head according to a first embodiment. 1 is a schematic cross-sectional view illustrating a magnetic recording head according to a first embodiment. It is a graph which illustrates the characteristic of a magnetic recording head. FIG. 4A to FIG. 4C are schematic views illustrating characteristics of the magnetic recording head. It is a graph which illustrates the characteristic of a magnetic recording head. 6 is a schematic plan view illustrating another magnetic recording head according to the first embodiment. FIG. FIG. 6 is a schematic plan view illustrating the operation of the magnetic recording head according to the first embodiment. FIG. 6 is a schematic plan view illustrating another magnetic recording head according to the second embodiment. It is a graph which illustrates the characteristic of a magnetic recording head. FIG. 10 is a schematic plan view illustrating a magnetic recording head according to a third embodiment. FIG. 10 is a schematic plan view illustrating another magnetic recording head according to the third embodiment. FIG. 10 is a schematic perspective view illustrating a magnetic recording device according to a fourth embodiment. FIG. 10 is a schematic perspective view illustrating a part of a magnetic recording apparatus according to a fourth embodiment. 1 is a schematic perspective view illustrating a magnetic recording apparatus according to an embodiment. FIG. 15A and FIG. 15B are schematic perspective views illustrating a part of the magnetic recording apparatus.

Each embodiment will be described below 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 the parts, and the like are not necessarily the same as actual ones. Even in the case of representing the same part, the dimensions and ratios may be represented differently depending on the drawings.
In the present specification and drawings, the same elements as those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description thereof is omitted as appropriate.

(First embodiment)
FIG. 1 is a schematic plan view illustrating the magnetic recording head according to the first embodiment.
FIG. 1 is a plan view of the magnetic recording head 110 as seen from the medium facing surface described later.
As shown in FIG. 1, the magnetic recording head 110 according to the present embodiment includes a first shield 41, a second shield 42, a magnetic pole 20, a first insulating part 31, a second insulating part 32, and a first shield. An intermediate layer 61 and a second intermediate layer 62 are included. In this example, a third shield 43, a fourth shield 44, a third insulating part 33, and a fourth insulating part 34 are further provided.

  The first shield 41 and the second shield 42 are, for example, side shields. The second shield 42 is separated from the first shield 41 in the first direction.

  The first direction is the Y-axis direction. One direction perpendicular to the Y-axis direction is taken as the X-axis direction. A direction perpendicular to the Y-axis direction and the X-axis direction is taken as a Z-axis direction.

  The magnetic pole 20 is provided between the first shield 41 and the second shield 42. The magnetic pole 20 includes a first end 21 and a second end 22. The second end 22 is separated from the first end 21 in the second direction. The second direction intersects the first direction. In this example, the second direction is the X-axis direction.

  The first end 21 has a length (first end length L1) along the first direction (Y-axis direction). The second end 22 has a length (second end length L2) along the first direction (Y-axis direction). The first end length L1 is longer than the second end length L2.

  The first end 21 is, for example, an end on the trailing side. The second end 22 is, for example, an end on the leading side. The magnetic pole 20 has side surfaces (first side surface 21s and second side surface 22s). The side surface is inclined with respect to the first direction and the second direction. Due to this inclination, the above difference in length occurs.

  The first insulating portion 31 is provided between the first shield 41 and the magnetic pole 20. For example, the first insulating portion 31 faces the first side surface 21 s of the magnetic pole 20.

  The second insulating portion 32 is provided between the second shield 42 and the magnetic pole 20. For example, the second insulating portion 32 faces the second side surface 22 s of the magnetic pole 20.

  The first intermediate layer 61 is provided between the first shield 41 and the first insulating portion 31. The first intermediate layer 61 includes at least one of Pt and Pd. The thickness (first thickness t1) along the first direction (Y-axis direction) of the first intermediate layer 61 is, for example, not less than 2 (nm) and not more than 20 nm. The first intermediate layer 61 may be in physical contact with the first shield 41.

  The second intermediate layer 62 is provided between the second shield 42 and the second insulating part 32. The second intermediate layer 62 includes at least one of Pt and Pd. The thickness (second thickness t2) along the first direction (Y-axis direction) of the second intermediate layer 62 is, for example, not less than 2 nm and not more than 20 nm. The second intermediate layer 62 may be in physical contact with the second shield 42.

  The fourth shield 44 is separated from the third shield 43 in the second direction (in this example, the X-axis direction). The magnetic pole 20 is disposed between the third shield 43 and the fourth shield 44. In this example, the first shield 41 and the second shield 42 are disposed between the third shield 43 and the fourth shield 44.

  The first end 21 of the magnetic pole 20 is provided between the third shield 43 and the fourth shield 44. The second end 22 of the magnetic pole 20 is provided between the first end 21 and the fourth shield 44. The magnetic pole 20 applies a recording magnetic field to the magnetic recording medium. The magnetic pole 20 is, for example, a main magnetic pole. The third shield 43 is, for example, a trailing shield.

  The third insulating portion 33 is provided between the third shield 43 and the first end portion 21. The fourth insulating portion 34 is provided between the fourth shield 44 and the second end portion 22.

  The first to fourth insulating portions 31 to 34 include, for example, an oxide of at least one of silicon (Si) and aluminum (Al). These insulating portions may include a nitride of at least one of Si and Al. These insulating portions may include oxynitride of at least one of Si and Al.

  The first to fourth shields 41 to 44 include, for example, iron and cobalt. The composition ratio of cobalt in the first shield 41 and the second shield 42 may be different from the composition ratio of cobalt in the third shield 43 and the fourth shield 44.

  A direction (first direction, Y-axis direction) connecting the first shield 41 and the second shield 42 corresponds to, for example, the track width direction. The direction (second direction, X-axis direction) connecting the third shield 43 and the fourth shield 44 corresponds to, for example, the downtrack direction when the skew angle is zero. The Z-axis direction corresponds to the height direction.

  In the embodiment, the first end 21 includes a first portion 21e and a second portion 21f. The position of the first portion 21e in the first direction is provided between the position of the first shield 41 in the first direction and the position of the second shield 42 in the first direction. The position of the second portion 21f in the first direction is provided between the position of the first portion 21e in the first direction and the position of the second shield 42 in the first direction. For example, the first portion 21 e is an end on the first shield 41 side. For example, the second portion 21 f is an end on the second shield 42 side. For example, the distance along the first direction between the first portion 21e and the second portion 21f corresponds to the first end length L1.

FIG. 2 is a schematic cross-sectional view illustrating the magnetic recording head according to the first embodiment.
The magnetic recording head 110 is disposed to face a magnetic recording medium 80 (for example, a magnetic disk). The magnetic recording head 110 has a medium facing surface 51 (ABS: Air Bearing Surface).

  The track width direction (Y-axis direction) is substantially parallel to the medium facing surface 51. The magnetic recording medium 80 includes, for example, a medium substrate 82 and a magnetic recording layer 81. The magnetic recording layer 81 is provided on the medium substrate 82. A plurality of recording bits 84 are provided in the magnetic recording layer 81. The magnetic recording medium 80 moves relative to the magnetic recording head 110 along the medium moving direction 85. The medium moving direction 85 is, for example, along the second direction (X-axis direction).

  The specific portion 80 p of the magnetic recording medium 80 faces the third shield 43 after facing the magnetic pole 20. The magnetization 83 is controlled in each of the plurality of recording bits 84 by the magnetic field applied from the magnetic recording head 110. Thereby, the recording operation is performed. In the magnetic recording head 110, a reproducing unit (not shown) for detecting the direction of the magnetization 83 may be further provided.

Hereinafter, examples of characteristics of the magnetic recording head 110 according to the embodiment will be described.
FIG. 3 is a graph illustrating characteristics of the magnetic recording head.
FIG. 3 shows the characteristics when writing with the magnetic recording head 110. FIG. 3 shows the characteristics of the magnetic recording head 119a of the first reference example and the magnetic recording head 119b of the second reference example, in addition to the characteristics of the magnetic recording head 110 according to the embodiment.

  In the magnetic recording head 110, the first end length L1 is about 70 nm. The first end length L1 corresponds to, for example, the main magnetic pole width. The length (main magnetic pole length) along the second direction (X-axis direction) of the magnetic pole 20 is about 90 nm. The side shield gap is about 35 nm. The side shield gap (SS gap SSg, see FIG. 1) is a distance along the Y-axis direction between the magnetic pole 20 and the first shield 41. The distance along the Y-axis direction between the magnetic pole 20 and the second shield 42 is the same as the distance along the Y-axis direction between the magnetic pole 20 and the first shield 41. The thickness of the intermediate layer (each of the first thickness t1 and the second thickness t2) is 20 nm. FeCo is used for the side shields (the first shield 41 and the second shield 42). At this time, the Gilbert damping constant (dumping constant α) is 0.08.

  On the other hand, in the magnetic recording head 119a of the first reference example, no intermediate layer is provided. The rest is the same as the magnetic recording head 110. At this time, the damping constant α of the side shield is 0.03.

  In the magnetic recording head 119b of the second reference example, no intermediate layer is provided, and the material of the side shield is different from that of the magnetic recording head 110. That is, in the second reference example, FeCo is used for the side shields (the first shield 41 and the second shield 42). That is, in the second reference example, Ta is added to the material of the magnetic recording head 110 in the side shield material. In the second reference example, the damping constant α of the side shield is 0.1.

  In FIG. 3, the horizontal axis represents the wrapping depth RD (nm). In the production of the magnetic recording head, a laminated film to be a magnetic recording head is formed. Then, in the portion on the medium facing surface 51 side, the laminated film is lapped. Thereby, the medium facing surface 51 is formed. Depending on the wrapping depth RD, the main pole width, the main pole length, and the SS gap SSg change. In FIG. 3, the vertical axis represents the SN ratio SNR1 (dB). In this case, the SN ratio SNR1 is an on-track SN ratio.

  As shown in FIG. 3, in the magnetic recording head 119a of the first reference example, the SN ratio SNR1 is low. In the magnetic recording head 119b of the second reference example, the SN ratio SNR1 is improved as compared with the first reference example in the region where the lapping depth RD is large. However, the degree of improvement is slight.

  On the other hand, in the magnetic recording head 110 according to the embodiment, a high SN ratio SNR1 is obtained. The difference in SN ratio SNR1 between the magnetic recording head 110 and the second reference example is about 4%. That is, according to the embodiment, the SN ratio can be improved by about 4%. Thereby, the recording density can be improved.

  In the embodiment, the SN ratio SNR1 is increased because the Gilbert damping constant α (damping constant) is increased in the side shield portion by providing the intermediate layers (the first intermediate layer 61 and the second intermediate layer 62). It is thought that.

  For example, the damping constant α in the Co layer is about 0.01. On the other hand, in the laminated film of the Co layer and the Pt layer, the damping constant α is, for example, about 0.06.

  For example, a magnetic material containing Co and Fe is used as the side shield. For example, the damping constant α varies depending on the composition ratio of Co and the like. However, even when the composition ratio is changed, the damping constant α is about 0.01 to 0.04.

  Here, the values of these damping constants α (about 0.06 and about 0.01 to 0.04) are the values of the damping constant α described with reference to FIG. 3 (0.08 and 0.03). ) And a little different. In many cases, there is a difference in the measured damping constant α between the film having a simple structure used in the experiment and the film in the state of the magnetic recording head. For example, the damping constant α of the film in the state of the magnetic recording head is often larger than the damping constant of the film having a simple structure. This is considered to be because the crystal constants or impurity states of the films are different from each other.

  In any case, the damping constant α (about 0.06) of the laminated film of the Co layer and the Pt layer is larger than the damping constant α (about 0.01 to 0.04) of the magnetic material containing Co and Fe. .

  At this time, a large damping constant α can be obtained by combining the magnetic material film containing Co and Fe and the intermediate layer.

  On the other hand, in the second reference example, a material having a large damping constant α is used for the side shield. For this reason, it is expected that the SN ratio SNR1 also increases in the second reference example. However, as shown in FIG. 3, the SN ratio SNR1 is low in the second reference example. In the second reference example, heavy metal is added to the side shield material so as to increase the damping constant α, and therefore, it is considered that the saturation magnetic flux density Bs has decreased. For this reason, it is considered that the SN ratio SNR1 is lowered.

  In order to increase the damping constant α, a method of adding a heavy metal to a magnetic material containing Co and Fe can be considered. However, the saturation magnetic flux density Bs is reduced by adding heavy metal. For this reason, in the second reference example, it is considered that the SN ratio SNR1 does not become sufficiently high.

  On the other hand, in the embodiment, the non-magnetic heavy metal is not mixed with the magnetic material of the side shield, but the intermediate layer containing the non-magnetic heavy metal is provided between the side shield and the main magnetic pole. The damping constant α is increased. As a result, there is no adverse effect such as a decrease in the saturation magnetic flux density Bs, and a large substantial damping constant α is obtained. Thereby, it is considered that a high SN ratio SNR1 can be obtained.

  In the embodiment, the damping constant α of the portion including the first shield 41 and the first intermediate layer 61 (the portion where the first shield 41 and the first intermediate layer 61 are in contact) is, for example, 0.08 or more and 0.2 or less. It is. The saturation magnetic flux density of the first shield 41 is 1.6 Tesla or more and 2.4 Tesla or less. Similarly, the damping constant α of the portion including the second shield 42 and the second intermediate layer 62 is not less than 0.08 and not more than 0.2, for example. The saturation magnetic flux density of the second shield 42 is 1.6 Tesla or more and 2.4 Tesla or less.

  Thus, in the embodiment, a high SN ratio SNR1 can be obtained by providing the intermediate layer. Hereinafter, a study that is conceived of a configuration in which an intermediate layer is provided will be described.

FIG. 4A to FIG. 4C are schematic views illustrating characteristics of the magnetic recording head.
FIG. 4A illustrates the time change of the recording magnetic field in the magnetic recording medium 80. The horizontal axis of Fig.4 (a) is time t (nsec). The vertical axis represents the recording magnetic field H1 (kOe) in the magnetic recording medium 80. A recording magnetic field generated by the magnetic recording head 110 is applied to the magnetic recording medium 80. The recording magnetic field at the position of the magnetic recording medium 80 corresponds to the recording magnetic field H1. In this example, “1” and “0” are recorded alternately.

  In FIG. 4A, attention is focused on the first state ST1 and the second state ST2. In the first state ST1, the recording magnetic field H1 is substantially maximum. In the second state ST2, the recording magnetic field H1 is almost 0, and the polarity of the recording magnetic field H1 is reversed. That is, the recording magnetic field H1 is switched between positive and negative.

  FIGS. 4B and 4C show the simulation results of the in-plane distribution of the recording magnetic field H1. FIG. 4B corresponds to the first state ST1. FIG. 4C corresponds to the second state ST2. In these figures, the concentration in the figure indicates the strength of the magnetic field (recording magnetic field H1).

  As shown in FIGS. 4A to 4C, when transitioning from “1” to “0” or “0” to “1”, it corresponds to the boundary between the side shield and the side gap. It was found that the magnetic field (recording magnetic field H1) was high in the region.

  As shown in FIG. 4B, in the first state ST1, the recording magnetic field H1 is high in the region corresponding to the first end 21 of the magnetic pole 20. The maximum value of the recording magnetic field H1 is about 16 kOe. In the first state ST1, it is considered that a desired recording magnetic field H1 is applied to the magnetic recording medium 80.

  As shown in FIG. 4C, it was found that in the second state ST2, the recording magnetic field H1 was high in the region corresponding to the side shield. A phenomenon in which the recording magnetic field H1 increases in a region corresponding to the side shield occurs at the time of polarity reversal. This phenomenon may be different between positive to negative inversion and negative to positive inversion. It is considered that the on-track recording characteristics are deteriorated when the adjacent track is overwritten by the increase in the recording magnetic field H1 in the region corresponding to the boundary region between the side shield and the side gap. This example is the case of roof tile recording. Even in the case of CMR recording (Conventional Magnetic Recording), the same phenomenon is observed in the change in recording characteristics after writing an adjacent track.

  Thus, when the polarity of the recording magnetic field H1 is reversed, a large magnetic field (fringe field) is generated at the edge of the side shield. In order to reduce the track pitch, the SS gap SSg is reduced to reduce the width of the magnetic field generated from the main pole. At this time, if the SS gap SSg is reduced, the influence of the fringe magnetic field is increased. For this reason, the SS gap SSg cannot be made sufficiently small. For this reason, it is difficult to sufficiently reduce the track pitch. Further, when the main magnetic pole width (first end length L1) is increased, the fringe magnetic field is also increased. For this reason, the main magnetic pole width (first end portion length L1) cannot be sufficiently increased even in shingled recording.

  This fringe magnetic field (a magnetic field generated at a position corresponding to the edge of the side shield when the polarity of the recording magnetic field H1 is reversed) has attracted attention. In order to reduce this fringe magnetic field, it is considered effective to increase the damping constant α of the side shield. The damping constant α is changed by changing the material of the side shield.

  Hereinafter, the relationship between the damping constant α and the SN ratio SNR1 will be described.

FIG. 5 is a graph illustrating characteristics of the magnetic recording head.
The horizontal axis in FIG. 5 is the SS gap SSg (nm). The vertical axis represents the SN ratio SNR1 (dB). FIG. 5 shows a simulation result of the SN ratio SNR1 when the physical property value of the side shield is changed. In the simulation model, no intermediate layer is provided.

  FIG. 5 shows the characteristics of the magnetic recording heads 119c to 119f of the third to sixth reference examples. In the magnetic recording head 119c, the damping constant α is 0.03, and the saturation magnetic flux density Bs is 1T (Tesla). In the magnetic recording head 119d, the damping constant α is 0.1 and the saturation magnetic flux density Bs is 1T (Tesla). In the magnetic recording head 119e, the damping constant α is 0.03, and the saturation magnetic flux density Bs is 1.6T (Tesla). In the magnetic recording head 119f, the damping constant α is 0.1, and the saturation magnetic flux density Bs is 1.6T (Tesla).

  As shown in FIG. 5, when the saturation magnetic flux density Bs is the same, the SN ratio SNR1 increases as the damping constant α increases. When the damping constant α is the same, the SN ratio SNR1 increases as the saturation magnetic flux density Bs increases.

  If the damping constant α can be increased while maintaining a large saturation magnetic flux density Bs, the SN ratio SNR1 can be increased. However, when the damping constant α is increased by devising the material of the side shield, the saturation magnetic flux density Bs is decreased.

  At this time, in the embodiment, an intermediate layer is provided in addition to the side shield. This intermediate layer contains at least one of Pt and Pd. This substantially increases the damping constant at the side shield portion. With such characteristics, the SN ratio SNR1 can be improved. Thereby, the recording density can be improved.

  Thus, attention has been focused on the characteristics of the recording magnetic field H1 when the polarity of the recording magnetic field H1 changes. In particular, a fringe magnetic field (a magnetic field generated at a position corresponding to the edge of the side shield when the polarity of the recording magnetic field H1 is reversed) has attracted attention. It has been studied to reduce the fringe magnetic field.

  Increasing the damping constant α of the side shield material increases the magnetic field reaction speed. Thereby, a fringe magnetic field can be made small and SN ratio SNR1 can be improved. At this time, when the damping constant α of the material of the side shield is increased, the saturation magnetic flux density Bs is lowered. For this reason, it is difficult to improve the actual characteristics. In the embodiment, the SN ratio SNR1 can be improved by providing an intermediate layer in addition to the side shield.

  On the other hand, WATE (Wide Adjacent track erasure) occurs due to a difference in response speed between the side shield and the main magnetic pole. This WAIT occurs in a separate track, not on-track. WAIT is a phenomenon that occurs over the entire width of the side shield. For this reason, WAIT is related to the overall damping constant α of the side shield.

  On the other hand, as described with reference to FIG. 4C, the fringe magnetic field is a deterioration of the characteristic generated on track. The fringing field occurs locally at the edge of the side shield. The idea of the countermeasure against the fringe magnetic field in the embodiment is different from the idea of the countermeasure against the WATE (control of the overall damping constant of the side shield).

FIG. 6 is a schematic plan view illustrating another magnetic recording head according to the first embodiment.
As shown in FIG. 6, another magnetic recording head 111 according to this embodiment includes first to fourth shields 41 to 44, a magnetic pole 20, first to fourth insulating portions 31 to 34, a first intermediate layer 61, In addition to the second intermediate layer 62, a fourth intermediate layer 64 is further included. Other than this, it is the same as the magnetic recording head 110, and the description thereof is omitted.

  Also in this case, the fourth shield 44 is separated from the third shield 43 in the second direction (X-axis direction). The first end portion 21 is provided between the third shield 43 and the fourth shield 44. The second end 22 is provided between the first end 21 and the fourth shield 44. The fourth insulating portion 34 is provided between the fourth shield 44 and the second end portion 22. The fourth intermediate layer 64 is provided between the fourth shield 44 and the fourth insulating portion 34. The fourth intermediate layer 64 includes at least one of Zr, Hf, Nb, Ta, Mo, W, Tc, Re, Ru, Os, Rh, Tr, Pd, and Pt.

  For example, the fourth intermediate layer 64 may be continuous with the first intermediate layer 61. The fourth intermediate layer 64 may be continuous with the second intermediate layer 62. The second intermediate layer 62 may be continuous with the first intermediate layer 61 via the fourth intermediate layer 64.

  The fourth intermediate layer 64 has a thickness (fourth thickness t4) in the second direction (X-axis direction). The fourth thickness t4 is, for example, not less than 2 nm and not more than 20 nm. For example, the fourth thickness t4 may be substantially the same as the first thickness t1.

  Also in the magnetic recording head 111, a high SN ratio SNR1 is obtained.

An example of a method for manufacturing the magnetic recording head 111 will be described.
For example, the fourth shield 44 is formed on a base (not shown). A film to be the first shield 41 and the second shield 42 is formed thereon. A part of this film is removed to form an opening. A film to be an intermediate layer is formed on the side surface of the opening. At this time, the magnetic recording head 111 is manufactured when a film serving as an intermediate layer is also formed on the bottom surface of the opening. On the other hand, when a film serving as an intermediate layer is formed on the side surface of the opening except for the bottom surface of the opening, the magnetic recording head 110 is manufactured. Thereafter, an insulating layer to be the first insulating portion 31, the second insulating portion 32, and the fourth insulating portion 34 is formed. Thereafter, a film to be the magnetic pole 20 is formed. Flatten the upper surface of the workpiece. Thereby, the 1st shield 41, the 2nd shield 42, and the magnetic pole 20 are formed. Thereafter, a film to be the third insulating portion 33 is formed. Further, a film that becomes the third shield 43 is formed. A magnetic recording head is obtained by processing the processed body into a predetermined shape.

  For example, the magnetic recording head 111 is easier to manufacture than the magnetic recording head 110.

  In the present embodiment, at least one of the first intermediate layer 61 and the second intermediate layer 62 is provided. Thus, the effective damping constant α can be increased in the side shield portion. For this reason, the recording characteristics are improved at the end of the recording track in the track width direction. The improvement of the recording characteristics at the end in the track width direction improves, for example, the recording characteristics in shingled recording (SMR).

  In the present embodiment, at least one of the first intermediate layer 61 and the second intermediate layer 62 is at least one of Zr, Hf, Nb, Ta, Mo, W, Tc, Re, Ru, Os, Rh, and Tr. Either may be included. At this time, the first intermediate layer 61 physically contacts the first shield 41. The second intermediate layer 62 physically contacts the second shield 42. Thereby, for example, the recording characteristics are improved. For example, the improvement of the recording characteristic at the end in the track width direction improves the recording characteristic in, for example, shingled recording (SMR). In the embodiment, when the first intermediate layer 61 includes at least one of Pt and Pd, the effect of increasing the substantial damping constant α is particularly high. Thereby, as already demonstrated, high SN ratio SNR1 is obtained, for example. For example, the recording characteristics are particularly improved.

Hereinafter, an example of roof tile recording will be described.
FIG. 7 is a schematic plan view illustrating the operation of the magnetic recording head according to the first embodiment. FIG. 7 illustrates the state of tile writing. In the magnetic recording medium 80, information is recorded at the first position 86a. Thereafter, information is recorded at the second position 86b. Thereafter, information is recorded at the third position 86c.

  For example, the magnetic recording medium 80 includes first to third regions 87a to 87c arranged in the track width direction. A second region 87b is disposed between the first region 87a and the third region 87c.

  At the first time, the first portion 21e faces the first region 87a. The magnetic pole 20 controls the direction of the magnetization 83 of the first region 87a. At the first time, the second portion 21f faces the second region 87b. The magnetic pole 20 controls the direction of the magnetization 83 in the second region 87b.

  At a second time after the first time, the first portion 21e faces the second region 87b. The magnetic pole 20 controls the direction of the magnetization 83 in the second region 87b. At the second time, the second portion 21f faces the third region 87c. The magnetic pole 20 controls the direction of the magnetization 83 in the third region 87c.

  In this way, information is recorded a plurality of times in one area of the magnetic recording medium 80.

  The first portion 21e records information on the magnetic recording medium 80 after the second portion 21f in the tile writing. That is, in the area where the information is recorded by the second part 21f, the information is recorded by the first part 21e.

  In the magnetic recording heads 110 and 111 according to the embodiment, the first intermediate layer 61 is provided. Thereby, the recording characteristics in the portion including the first portion 21e are improved. When recording on the magnetic recording medium 80, there are two directions in the track width direction. For example, there are a direction from the outer periphery to the inner periphery and a direction from the inner periphery to the outer periphery. By providing the first intermediate layer 61, the characteristics are improved in the tile writing along one of these two directions. Providing the second intermediate layer 62 improves the characteristics in tiled writing along another one of these two directions.

It is particularly advantageous to apply the configuration according to the present embodiment to the tile writing operation. According to the embodiment, a magnetic recording head and a magnetic recording apparatus that can improve recording density can be provided. Furthermore, the configuration according to the present embodiment may be applied to CMR recording (Conventional Magnetic Recording).
(Second Embodiment)
FIG. 8 is a schematic plan view illustrating another magnetic recording head according to the second embodiment.
As shown in FIG. 8, in addition to the first to fourth shields 41 to 44, the magnetic pole 20, and the first to fourth insulating parts 31 to 34, another magnetic recording head 120 according to this embodiment includes 3 intermediate layers 63 are further included. Other than this, it is the same as the magnetic recording head 110, and the description thereof is omitted.

  Also in this case, the fourth shield 44 is separated from the third shield 43 in the first direction (X-axis direction). The first end portion 21 is provided between the third shield 43 and the fourth shield 44. The second end 22 is provided between the first end 21 and the fourth shield 44. The third insulating portion 33 is provided between the third shield 43 and the first end portion 21. The third intermediate layer 63 is provided between the third shield 43 and the third insulating portion 33. The third intermediate layer 63 includes at least one of Pt and Pd.

  The third intermediate layer 63 has a thickness (third thickness t3) in the first direction (X-axis direction). The third thickness t3 is, for example, not less than 2 nm and not more than 20 nm. The third thickness t3 may be substantially the same as the first thickness t1, for example.

  In the magnetic recording head 120, the damping constant α is substantially increased at the third shield 43 (trailing shield). For example, by providing the third intermediate layer 63, for example, the relaxation time of the contact portion between the tracing shield and the intermediate layer is shortened by 30% compared to the case where the third intermediate layer 63 is not provided. Thereby, the recording density can be improved.

FIG. 9 is a graph illustrating characteristics of the magnetic recording head.
The horizontal axis of FIG. 9 is the wrapping depth RD (nm). The vertical axis represents the SN ratio SNR1 (dB). FIG. 9 shows a simulation result of the SN ratio SNR1 when the physical property value of the trailing shield (for example, the third shield 43) is changed. In the simulation model, no intermediate layer is provided.

  In FIG. 9, the characteristics of the magnetic recording heads 119g to 119j of the seventh to tenth reference examples are shown. In the magnetic recording head 119g, the damping constant α is 0.03, and the saturation magnetic flux density Bs is 1.9T (Tesla). In the magnetic recording head 119h, the damping constant α is 0.08, and the saturation magnetic flux density Bs is 1.9T (Tesla). In the magnetic recording head 119i, the damping constant α is 0.03, and the saturation magnetic flux density Bs is 2.4T (Tesla). In the magnetic recording head 119j, the damping constant α is 0.08, and the saturation magnetic flux density Bs is 2.4T (Tesla).

  As shown in FIG. 9, when the saturation magnetic flux density Bs is the same, the SN ratio SNR1 increases as the damping constant α increases. When the damping constant α is the same, the SN ratio SNR1 increases as the saturation magnetic flux density Bs increases.

  As already described, if the damping constant α can be increased while maintaining a large saturation magnetic flux density Bs, the SN ratio SNR1 can be increased. However, when the damping constant α is increased by devising the material of the side shield, the saturation magnetic flux density Bs is decreased.

  In the present embodiment, the recording characteristics can be improved in the trailing shield portion by providing the third intermediate layer 63. Thereby, the recording density can be improved.

  For example, in the magnetic recording head 120, the SN ratio is improved, for example, in the CMR operation.

(Third embodiment)
FIG. 10 is a schematic plan view illustrating a magnetic recording head according to the third embodiment.
As shown in FIG. 10, another magnetic recording head 130 according to this embodiment includes first to fourth shields 41 to 44, a magnetic pole 20, first to fourth insulating portions 31 to 34, a first intermediate layer 61, and In addition to the second intermediate layer 62, a third intermediate layer 63 is further included. Other than this, it is the same as the magnetic recording head 110, and the description thereof is omitted.

  In the magnetic recording head 130, since the first intermediate layer 61 is provided, the recording characteristics are improved, for example, in the track width direction. Furthermore, by providing the third intermediate layer 63, the recording characteristics are improved in the trailing direction. Thereby, a magnetic recording head and a magnetic recording apparatus capable of improving the recording density can be provided.

  FIG. 11 is a schematic plan view illustrating another magnetic recording head according to the third embodiment. As shown in FIG. 11, another magnetic recording head 131 according to this embodiment includes first to fourth shields 41 to 44, a magnetic pole 20, first to fourth insulating portions 31 to 34, a first intermediate layer 61, In addition to the second intermediate layer 62 and the third intermediate layer 63, a fourth intermediate layer 64 is further included. Other than this, it is the same as the magnetic recording head 110, and the description thereof is omitted.

  Also in the magnetic recording head 131, for example, the recording characteristics are improved in the track width direction and the trailing direction. Thereby, a magnetic recording head and a magnetic recording apparatus capable of improving the recording density can be provided.

(Fourth embodiment)
The fourth embodiment relates to a magnetic storage device. The magnetic storage device according to the present embodiment includes any one of the first to third embodiments, a modified magnetic recording head, and a magnetic recording medium. Hereinafter, a case where the magnetic recording head 110 is used will be described.

FIG. 12 is a schematic perspective view illustrating a magnetic recording apparatus according to the fourth embodiment.
In FIG. 12, the third shield 43, the fourth shield 44, the first shield 41, the second shield 42, and the like are omitted.

  A recording coil 28 is provided on the magnetic pole 20 of the magnetic recording head 110. A recording magnetic field is generated in the magnetic pole 20 by the current supplied to the recording coil 28. The generated recording magnetic field is applied to the magnetic recording medium 80. A plurality of tracks (for example, first to fourth tracks Tr1 to Tr4) are formed on the magnetic recording medium 80. The pitch of a plurality of tracks corresponds to the track pitch Trp.

  As shown in FIG. 12, the magnetic recording head 110 may further include a reproducing unit 70. The reproduction unit 70 includes a first reproduction shield 72a, a second reproduction shield 72b, and a reproduction element 71. The reproduction element 71 is provided between the first reproduction shield 72a and the second reproduction shield 72b. The reproducing element 71 detects the state of the magnetization 83 of the recording bit 84 in which information is recorded.

  In the magnetic recording device 150, a control unit 55 may be provided. An electrical signal is supplied from the control unit 55 to the recording coil 28. The control unit 55 may detect the state of the electrical resistance of the reproducing element 71.

FIG. 13 is a schematic perspective view illustrating a part of the magnetic recording apparatus according to the fourth embodiment. FIG. 13 illustrates a head slider on which a magnetic recording head is mounted.
The magnetic recording head 110 is mounted on the head slider 3. For example, Al ₂ O ₃ / TiC is used for the head slider 3. The head slider 3 moves relative to the magnetic recording medium 80 while flying or contacting the magnetic recording medium 80.

  The head slider 3 has, for example, an air inflow side 3A and an air outflow side 3B. The magnetic recording head 110 is disposed on the side surface of the air outflow side 3B of the head slider 3 or the like. As a result, the magnetic recording head 110 mounted on the head slider 3 moves relative to the magnetic recording medium 80 while flying above or in contact with the magnetic recording medium 80.

FIG. 14 is a schematic perspective view illustrating the magnetic recording apparatus according to the embodiment.
FIG. 15A and FIG. 15B are schematic perspective views illustrating a part of the magnetic recording apparatus.
As shown in FIG. 14, the magnetic recording apparatus 150 according to the embodiment is an apparatus using a rotary actuator. The recording medium disk 180 is mounted on the spindle motor 4 and is rotated in the direction of arrow A by a motor that responds to a control signal from the drive control unit. The magnetic recording apparatus 150 according to this embodiment may include a plurality of recording medium disks 180. The magnetic recording device 150 may include a recording medium 181. For example, the magnetic recording device 150 is a hybrid HDD (Hard Disk Drive). The recording medium 181 is, for example, an SSD (Solid State Drive). For the recording medium 181, for example, a nonvolatile memory such as a flash memory is used.

  The head slider 3 that records and reproduces information stored in the recording medium disk 180 has the configuration as described above, and is attached to the tip of a thin-film suspension 154. Here, for example, one of the magnetic recording heads according to the embodiments already described is mounted near the tip of the head slider 3.

  When the recording medium disk 180 rotates, the pressure applied by the suspension 154 balances with the pressure generated at the medium facing surface (ABS) of the head slider 3, and the medium facing surface of the head slider 3 is separated from the surface of the recording medium disk 180. It is held with a predetermined flying height. A so-called “contact traveling type” in which the head slider 3 is in contact with the recording medium disk 180 may be used.

  The suspension 154 is connected to one end of an arm 155 (for example, an actuator arm). The arm 155 has, for example, a bobbin portion that holds a drive coil. At the other end of the arm 155, a voice coil motor 156, which is a kind of linear motor, is provided. The voice coil motor 156 can include a drive coil wound around the bobbin portion of the arm 155, and a magnetic circuit composed of a permanent magnet and a counter yoke arranged to face each other so as to sandwich the coil. The suspension 154 has one end and the other end, the magnetic recording head is mounted on one end of the suspension 154, and the arm 155 is connected to the other end of the suspension 154.

  The arm 155 is held by ball bearings provided at two upper and lower portions of the bearing portion 157, and can be freely slid and rotated by a voice coil motor 156. As a result, the magnetic recording head can be moved to an arbitrary position on the recording medium disk 180.

FIG. 15A illustrates a partial configuration of the magnetic recording apparatus and is an enlarged perspective view of the head stack assembly 160.
FIG. 15B is a perspective view illustrating a magnetic recording head assembly (head gimbal assembly: HGA) 158 that is a part of the head stack assembly 160.

  As shown in FIG. 15A, the head stack assembly 160 includes a bearing portion 157, a head gimbal assembly 158, and a support frame 161. The head gimbal assembly 158 extends from the bearing portion 157. The support frame 161 extends from the bearing portion 157 in the direction opposite to the HGA. The support frame 161 supports the coil 162 of the voice coil motor.

  As shown in FIG. 15B, the head gimbal assembly 158 includes an arm 155 extending from the bearing portion 157 and a suspension 154 extending from the arm 155.

  A head slider 3 is attached to the tip of the suspension 154. One of the magnetic recording heads according to the embodiment is mounted on the head slider 3.

  That is, the magnetic recording head assembly (head gimbal assembly) 158 according to the embodiment includes the magnetic recording head according to the embodiment, the head slider 3 on which the magnetic recording head is mounted, and the suspension 154 on which the head slider 3 is mounted at one end. An arm 155 connected to the other end of the suspension 154.

  The suspension 154 has leads (not shown) for recording and reproducing signals, for heaters for adjusting the flying height, and for example for spin torque oscillators. These lead wires and the respective electrodes of the magnetic recording head incorporated in the head slider 3 are electrically connected.

  In addition, a signal processing unit 190 is provided for recording and reproducing signals on the magnetic recording medium using the magnetic recording head. For example, the signal processing unit 190 is provided in a part of the magnetic recording device 150 (see FIG. 14). The input / output lines of the signal processing unit 190 are connected to the electrode pads of the head gimbal assembly 158 and are electrically coupled to the magnetic recording head.

  As described above, the magnetic recording apparatus 150 according to the present embodiment is in a state where the magnetic recording medium, the magnetic recording head according to the above-described embodiment, and the magnetic recording medium and the magnetic recording head are separated from or in contact with each other. A movable unit that is relatively movable, a position control unit that aligns the magnetic recording head with a predetermined recording position of the magnetic recording medium, and a signal that records and reproduces signals on the magnetic recording medium using the magnetic recording head A processing unit.

That is, a recording medium disk 180 is used as the magnetic recording medium.
The movable part can include the head slider 3.
The position controller may include a head gimbal assembly 158.

  As described above, the magnetic recording apparatus 150 according to the present embodiment uses the magnetic recording medium, the magnetic recording head assembly according to the embodiment, and the signal to the magnetic recording medium using the magnetic recording head mounted on the magnetic recording head assembly. A signal processing unit that performs recording and reproduction.

The embodiment comprises the following configuration,
(Configuration 1)
A first shield;
A second shield away from the first shield in a first direction;
A magnetic pole provided between the first shield and the second shield, wherein the magnetic pole is separated from the first end in a first end and a second direction intersecting the first direction. A first end length along the first direction of the first end portion is longer than a second end length along the first direction of the second end portion, Magnetic poles,
A first insulating portion provided between the first shield and the magnetic pole;
A first intermediate layer provided between the first shield and the first insulating portion and including at least one of Pt and Pd;
A magnetic recording head comprising:

(Configuration 2)
A second insulating portion provided between the second shield and the magnetic pole;
A second intermediate layer provided between the second shield and the second insulating part and including at least one of Pt and Pd;
The magnetic recording head according to Configuration 1, further comprising:

(Configuration 3)
The magnetic recording head according to Configuration 2, wherein a thickness of the second intermediate layer along the first direction is not less than 2 nanometers and not more than 20 nanometers.

(Configuration 4)
The magnetic recording head according to any one of configurations 1 to 3, wherein a thickness of the first intermediate layer along the first direction is not less than 2 nanometers and not more than 20 nanometers.

(Configuration 5)
A third shield,
A fourth shield spaced from the third shield in the first direction;
A third insulating part;
A third intermediate layer containing at least one of Pt and Pd;
Further comprising
The first end is provided between the third shield and the fourth shield,
The second end is provided between the first end and the fourth shield,
The third insulating portion is provided between the third shield and the first end portion,
The magnetic recording head according to any one of Configurations 1 to 4, wherein the third intermediate layer is provided between the third shield and the third insulating portion.

(Configuration 6)
A third shield,
A fourth shield spaced from the third shield in the first direction;
A fourth insulating portion;
A fourth intermediate layer containing at least one of Pt and Pd;
Further comprising
The first end is provided between the third shield and the fourth shield,
The second end is provided between the first end and the fourth shield,
The fourth insulating portion is provided between the fourth shield and the second end portion,
The magnetic recording head according to any one of Configurations 1 to 4, wherein the fourth intermediate layer is provided between the fourth shield and the fourth insulating portion.

(Configuration 7)
The magnetic recording head according to Configuration 6, wherein the fourth intermediate layer includes at least one of Zr, Hf, Nb, Ta, Mo, W, Tc, Re, Ru, Os, Rh, Tr, Pd, and Pt.

(Configuration 8)
The magnetic recording head according to any one of Configurations 1 to 7, wherein the first shield includes at least one of Fe, Co, and Ni.

(Configuration 9)
The magnetic recording head according to any one of Configurations 1 to 8, wherein a damping constant of a portion including the first shield and the first intermediate layer is 0.08 or more and 0.2 or less.

(Configuration 10)
The magnetic recording head according to any one of configurations 1 to 9, wherein a saturation magnetic flux density of the first shield is not less than 1.6 Tesla and not more than 2.4 Tesla.

(Configuration 11)
The magnetic recording head according to any one of Configurations 1 to 10, wherein the third shield is a trailing shield.

(Configuration 12)
A first shield;
A second shield away from the first shield in a first direction;
A magnetic pole provided between the first shield and the second shield, wherein the magnetic pole is separated from the first end in a first end and a second direction intersecting the first direction. A first end length along the first direction of the first end portion is longer than a second end length along the first direction of the second end portion, Magnetic poles,
A first insulating portion provided between the first shield and the magnetic pole;
At least one of Zr, Hf, Nb, Ta, Mo, W, Tc, Re, Ru, Os, Rh, and Tr provided between the first shield and the first insulating portion and in contact with the first shield A first intermediate layer including any one of the following:
A magnetic recording head comprising:

(Configuration 13)
A second insulating portion provided between the second shield and the magnetic pole;
At least one of Zr, Hf, Nb, Ta, Mo, W, Tc, Re, Ru, Os, Rh, and Tr provided between the second shield and the second insulating portion; A second intermediate layer comprising any of the following:
The magnetic recording head according to Configuration 12, further comprising:

(Configuration 14)
The magnetic recording head according to any one of configurations 1 to 13, and
A magnetic recording medium on which information is recorded by the magnetic pole;
A magnetic recording apparatus.

(Configuration 15)
The first end includes a first portion and a second portion,
The position of the first portion in the first direction is provided between the position of the first shield in the first direction and the position of the second shield in the first direction;
A position of the second part in the first direction is provided between the position of the first part in the first direction and the position of the second shield in the first direction;
The structure according to claim 14, wherein when recording information on the magnetic recording medium, the first portion records the information on the magnetic recording medium after the second portion when recording information on the magnetic recording medium. Magnetic recording device.

(Configuration 16)
The first end includes a first portion and a second portion,
The position of the first portion in the first direction is provided between the position of the first shield in the first direction and the position of the second shield in the first direction;
A position of the second part in the first direction is provided between the position of the first part in the first direction and the position of the second shield in the first direction;
The magnetic recording medium includes first to third regions arranged in the first direction, and the second region is disposed between the first region and the third region,
The magnetic pole is
At a first time, the first portion controls the magnetization direction of the first region facing the first region,
At the first time, the second portion controls the magnetization direction of the second region facing the second region,
The magnetic pole is
At a second time after the first time, the first portion faces the second region and controls the direction of the magnetization of the second region;
The magnetic recording device according to the configuration 14, wherein the second portion controls the magnetization direction of the third region facing the third region at the second time.

(Configuration 17)
The magnetic recording device according to any one of Configurations 14 to 16, wherein the magnetic recording medium is a perpendicular magnetic recording medium.

  According to the embodiment, a magnetic recording head and a magnetic recording apparatus that can improve recording density are provided.

  In the present specification, “vertical” and “parallel” include not only strictly vertical and strictly parallel, but also include, for example, variations in the manufacturing process, and may be substantially vertical and substantially parallel. It ’s fine.

  The embodiments of the present invention have been described above with reference to specific examples. However, embodiments of the present invention are not limited to these specific examples. For example, the specific configuration of each element such as a shield, a magnetic pole, an intermediate layer and an insulating part included in the magnetic recording head, and a magnetic recording medium included in the magnetic recording apparatus is appropriately selected by those skilled in the art from a known range. By doing so, the present invention is included in the scope of the present invention as long as the same effects can be obtained and similar effects can be obtained.

  Moreover, what combined any two or more elements of each specific example in the technically possible range is also included in the scope of the present invention as long as the gist of the present invention is included.

  In addition, any magnetic recording apparatus that can be implemented by a person skilled in the art based on the magnetic recording apparatus described above as an embodiment of the present invention can be implemented as long as it includes the gist of the present invention. Belonging to.

  In addition, in the category of the idea of the present invention, those skilled in the art can conceive of various changes and modifications, and it is understood that these changes and modifications also belong to the scope of the present invention. .

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 3 ... Head slider, 3A ... Air inflow side, 3B ... Air outflow side, 4 ... Spindle motor, 20 ... Magnetic pole, 21e, 21f ... 1st, 2nd part, 21, 22 ... 1st, 2nd edge part, 21e , 21f... 1st, 2nd portion, 21s, 22s... 1st and 2nd side surfaces, 28... Recording coil, 31 to 34... 1st to 4th insulating part, 41 to 44. , Medium facing surface, 55, control unit, 61-64, first to fourth intermediate layers, 70, reproducing unit, 71, reproducing element, 71a, 71b, first and second reproducing shields, 80, magnetic recording medium, 80p ... part, 81 ... magnetic recording layer, 82 ... medium substrate, 83 ... magnetization, 84 ... recording bit, 85 ... medium moving direction, 86a to 86c ... first to third positions, 87a to 87c ... first to third Region, 110, 111, 119 119j, 120, 130, 131 ... magnetic recording head, 150 ... magnetic recording device, 154 ... suspension, 155 ... actuator arm, 156 ... voice coil motor, 157 ... bearing, 158 ... head gimbal assembly, 160 ... head stack assembly 161 ... support frame, 162 ... coil, 180 ... recording medium disk, 181 ... recording medium, 190 ... signal processing unit, A ... arrow, H1 ... recording magnetic field, L1, L2 ... first and second end lengths, RD ... lapping depth, SNR1 ... SN ratio, SSg ... SS gap, ST1, ST2 ... first and second states, Tr1, Tr4 ... first to fourth tracks, Trp ... track pitch, t ... time, t1-t4 ... 1st to 4th thickness

Claims (10)

A first shield;
A second shield away from the first shield in a first direction;
A magnetic pole provided between the first shield and the second shield, wherein the magnetic pole is separated from the first end in a first end and a second direction intersecting the first direction. A first end length along the first direction of the first end portion is longer than a second end length along the first direction of the second end portion, Magnetic poles,
A first insulating portion provided between the first shield and the magnetic pole;
A first intermediate layer provided between the first shield and the first insulating portion and including at least one of Pt and Pd;
A magnetic recording head comprising: A third shield,
A fourth shield spaced from the third shield in the first direction;
A third insulating part;
A third intermediate layer containing at least one of Pt and Pd;
Further comprising
The first end is provided between the third shield and the fourth shield,
The second end is provided between the first end and the fourth shield,
The third insulating portion is provided between the third shield and the first end portion,
The magnetic recording head according to claim 1, wherein the third intermediate layer is provided between the third shield and the third insulating portion. A third shield,
A fourth shield spaced from the third shield in the first direction;
A fourth insulating portion;
A fourth intermediate layer containing at least one of Pt and Pd;
Further comprising
The first end is provided between the third shield and the fourth shield,
The second end is provided between the first end and the fourth shield,
The fourth insulating portion is provided between the fourth shield and the second end portion,
The magnetic recording head according to claim 1, wherein the fourth intermediate layer is provided between the fourth shield and the fourth insulating portion.   The magnetic recording head according to claim 3, wherein the fourth intermediate layer includes at least one of Zr, Hf, Nb, Ta, Mo, W, Tc, Re, Ru, Os, Rh, Tr, Pd, and Pt.   5. The magnetic recording head according to claim 1, wherein a damping constant of a portion including the first shield and the first intermediate layer is 0.08 or more and 0.2 or less.   6. The magnetic recording head according to claim 1, wherein a saturation magnetic flux density of the first shield is 1.6 Tesla or more and 2.4 Tesla or less. A first shield;
A second shield away from the first shield in a first direction;
A magnetic pole provided between the first shield and the second shield, wherein the magnetic pole is separated from the first end in a first end and a second direction intersecting the first direction. A first end length along the first direction of the first end portion is longer than a second end length along the first direction of the second end portion, Magnetic poles,
A first insulating portion provided between the first shield and the magnetic pole;
At least one of Zr, Hf, Nb, Ta, Mo, W, Tc, Re, Ru, Os, Rh, and Tr provided between the first shield and the first insulating portion and in contact with the first shield A first intermediate layer including any one of the following:
A magnetic recording head comprising: A magnetic recording head according to any one of claims 1 to 7,
A magnetic recording medium on which information is recorded by the magnetic pole;
A magnetic recording apparatus. The first end includes a first portion and a second portion,
The position of the first portion in the first direction is provided between the position of the first shield in the first direction and the position of the second shield in the first direction;
A position of the second part in the first direction is provided between the position of the first part in the first direction and the position of the second shield in the first direction;
9. When recording information on a magnetic recording medium, the first portion records the information on the magnetic recording medium after the second portion when recording information on the magnetic recording medium. Magnetic recording device. The first end includes a first portion and a second portion,
The position of the first portion in the first direction is provided between the position of the first shield in the first direction and the position of the second shield in the first direction;
A position of the second part in the first direction is provided between the position of the first part in the first direction and the position of the second shield in the first direction;
The magnetic recording medium includes first to third regions arranged in the first direction, and the second region is disposed between the first region and the third region,
The magnetic pole is
At a first time, the first portion controls the magnetization direction of the first region facing the first region,
At the first time, the second portion controls the magnetization direction of the second region facing the second region,
The magnetic pole is
At a second time after the first time, the first portion faces the second region and controls the direction of the magnetization of the second region;
The magnetic recording apparatus according to claim 8, wherein the second portion controls the magnetization direction of the third region facing the third region at the second time.