公开(公告)号：US20050135018A1

公开(公告)日：2005-06-23

申请号：US11061513

申请日：2005-02-22

申请人： Katsuhiko Koui ,  Masatoshi Yoshikawa ,  Masayuki Takagishi ,  Masashi Sahashi ,  Takeo Sakakubo ,  Hitoshi Iwasaki

发明人： Katsuhiko Koui ,  Masatoshi Yoshikawa ,  Masayuki Takagishi ,  Masashi Sahashi ,  Takeo Sakakubo ,  Hitoshi Iwasaki

IPC分类号： G11B5/39 ,  H01F10/32 ,  H01L43/08 ,  G11B5/33 ,  G11B5/127

CPC分类号： H01L43/08 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3903 ,  G11B5/3909 ,  G11B2005/3996 ,  H01F10/3254 ,  H01F10/3259 ,  H01F10/3268 ,  H01L27/224 ,  H01L27/228

摘要： A magnetoresistance effect element comprises a magnetoresistance effect film including a magnetically pinned layer whose direction of magnetization is pinned substantially in one direction, a magnetically free layer whose direction of magnetization changes in response to an external magnetic field, and a nonmagnetic intermediate layer located between the pinned layer and the free layer; and a pair of electrodes electrically connected to said magnetoresistance effect film to supply a sense current perpendicularly to a film plane of said magnetoresistance effect film. The intermediate layer has a first layer including a first region whose resistance is relatively high and second regions whose resistance is relatively low. The sense current preferentially flows through the second regions when the current passes the first layer. Alternatively, the concentration of oxygen in the first layer may have a two-dimensional fluctuation, and a first region where the concentration of oxygen is equal to or higher than 40 atomic % and a second region where the concentration of oxygen is equal to or lower than 35 atomic % may be provided in the first layer.

公开(公告)号：US06784509B2

公开(公告)日：2004-08-31

申请号：US10217410

申请日：2002-08-14

申请人： Hiromi Yuasa ,  Yuzo Kamiguchi ,  Masatoshi Yoshikawa ,  Katsuhiko Koui ,  Hitoshi Iwasaki ,  Tomohiko Nagata ,  Takeo Sakakubo ,  Masashi Sahashi

发明人： Hiromi Yuasa ,  Yuzo Kamiguchi ,  Masatoshi Yoshikawa ,  Katsuhiko Koui ,  Hitoshi Iwasaki ,  Tomohiko Nagata ,  Takeo Sakakubo ,  Masashi Sahashi

IPC分类号： H01L2982

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/00 ,  G11B5/3903 ,  G11B2005/3996 ,  H01F10/30 ,  H01F10/3227 ,  H01F10/3272 ,  H01F10/3295 ,  H01L43/08 ,  H01L43/10

摘要： In a spin valve type element, an interface insertion layer (32, 34) of a material exhibiting large spin-dependent interface scattering is inserted in a location of a magnetically pinned layer (16) or a magnetically free layer (20) closer to a nonmagnetic intermediate layer (18). A nonmagnetic back layer (36) may be additionally inserted as an interface not in contact with the nonmagnetic intermediate layer to increase the output by making use of spin-dependent interface scattering along the interface between the pinned layer and the nonmagnetic back layer or between the free layer and the nonmagnetic back layer.

摘要翻译： 在自旋阀型元件中，将表现出大的自旋相关界面散射的材料的界面插入层（32,34）插入到更靠近磁性固定层（16）或磁性层（20）的位置 非磁性中间层（18）。 可以另外插入非磁性背层（36）作为不与非磁性中间层接触的界面，以通过利用沿被钉扎层和非磁性背层之间的界面处的自旋相关界面散射来增加输出， 自由层和非磁背层。

公开(公告)号：US08976490B2

公开(公告)日：2015-03-10

申请号：US13565418

申请日：2012-08-02

申请人： Kenichiro Yamada ,  Katsuhiko Koui

发明人： Kenichiro Yamada ,  Katsuhiko Koui

IPC分类号： G11B5/127 ,  G11B5/31 ,  G11B5/00

CPC分类号： G11B5/35 ,  G11B5/1278 ,  G11B5/315 ,  G11B2005/0005 ,  G11B2005/0024

摘要： According to one embodiment, a magnetic recording head includes a main pole configured to apply a recording magnetic field to a recording layer of a recording medium, a trailing shield opposed to the main pole with a write gap therebetween, and a high-frequency oscillator between the main pole and the trailing shield in a range of a width of the main pole in a track width direction, and configured to generate a high-frequency magnetic field. The high-frequency oscillator includes a spin injection layer, an intermediate layer, and an oscillation layer, and at least the oscillation layer comprises divided oscillation regions.

摘要翻译： 根据一个实施例，磁记录头包括：主极，被配置为向记录介质的记录层施加记录磁场;与主极相对的后屏蔽，其间具有写入间隙;以及高频振荡器， 所述主极和所述后屏蔽体在所述主极的宽度方向上在轨道宽度方向上的宽度范围内，并且被配置为产生高频磁场。 高频振荡器包括自旋注入层，中间层和振荡层，至少振荡层包括分频振荡区域。

公开(公告)号：US08929031B2

公开(公告)日：2015-01-06

申请号：US13291777

申请日：2011-11-08

申请人： Akihiko Takeo ,  Satoshi Shirotori ,  Kenichiro Yamada ,  Katsuhiko Koui

发明人： Akihiko Takeo ,  Satoshi Shirotori ,  Kenichiro Yamada ,  Katsuhiko Koui

IPC分类号： G11B5/127 ,  G11B5/31 ,  H01F10/32 ,  H01F41/30 ,  H01L43/08 ,  G11B5/00

CPC分类号： G11B5/3163 ,  B82Y40/00 ,  G11B5/1278 ,  G11B5/314 ,  G11B2005/0024 ,  H01F10/325 ,  H01F10/3286 ,  H01F10/329 ,  H01F41/302 ,  H01F41/308 ,  H01L43/08 ,  Y10T29/4902 ,  Y10T29/49032 ,  Y10T428/1186

摘要： According to one embodiment, there is provided a spin torque oscillator including an oscillation layer formed of a magnetic material, a spin injection layer formed of a magnetic material and configured to inject a spin into the oscillation layer, and a current confinement layer including an insulating portion formed of an oxide or a nitride and a conductive portion formed of a nonmagnetic metal and penetrating the insulating portion in a direction of stacking. The conductive portion of the current confinement layer is positioned near a central portion of a plane of a device region including the oscillation layer and the spin injection layer.

摘要翻译： 根据一个实施例，提供了一种自旋扭矩振荡器，其包括由磁性材料形成的振荡层，由磁性材料形成的自旋注入层，并被配置为向振荡层注入自旋;以及电流限制层，其包括绝缘体 由氧化物或氮化物形成的部分和由非磁性金属形成的导电部分，并且在堆叠方向上穿透绝缘部分。 电流限制层的导电部分位于包括振荡层和自旋注入层的器件区域平面的中心部分附近。

公开(公告)号：US08817419B2

公开(公告)日：2014-08-26

申请号：US13171418

申请日：2011-06-28

申请人： Soichi Oikawa ,  Katsuhiko Koui

发明人： Soichi Oikawa ,  Katsuhiko Koui

IPC分类号： G11B5/127 ,  G11B13/08

CPC分类号： G11B5/3146 ,  G11B5/1278 ,  G11B2005/0005 ,  G11B2005/0024

摘要： According to one embodiment, a magnetic recording head includes a main magnetic pole generating a recording magnetic field in a magnetic recording medium, a return yoke paired with the main magnetic pole, and a spin torque oscillator interposed between the main magnetic pole and the return yoke and including a spin injection layer, an oscillation layer, a nonmagnetic metal layer, and spin assist layer stacked in this order, wherein the nonmagnetic metal layer includes at least one metal selected from the group consisting of Cu, Au, Ag, Al, Pd, Pt, Os, and Ir, and the spin assist layer is a soft magnetic layer whose saturation magnetic flux density (Bs), diamagnetic field coefficient (N) and gap magnetic field (Hg) show a relationship expressed by Bs×N>Hg.

摘要翻译： 根据一个实施例，磁记录头包括在磁记录介质中产生记录磁场的主磁极，与主磁极配对的返回磁轭和插在主磁极和返回磁轭之间的自旋扭矩振荡器 并且包括依次层叠的自旋注入层，振荡层，非磁性金属层和自旋辅助层，其中，所述非磁性金属层包含选自Cu，Au，Ag，Al，Pd ，Pt，Os和Ir，自旋辅助层是饱和磁通密度（Bs），反磁场系数（N）和间隙磁场（Hg）表现出由Bs×N> Hg表示的关系的软磁性层 。

公开(公告)号：US08705204B2

公开(公告)日：2014-04-22

申请号：US13591012

申请日：2012-08-21

申请人： Tomoko Taguchi ,  Kenichiro Yamada ,  Katsuhiko Koui ,  Tomomi Funayama ,  Norihito Fujita

发明人： Tomoko Taguchi ,  Kenichiro Yamada ,  Katsuhiko Koui ,  Tomomi Funayama ,  Norihito Fujita

IPC分类号： G11B5/31

CPC分类号： G11B5/3116 ,  G11B2005/0002

摘要： According to one embodiment, a main pole of a recording head includes a first magnetic pole layer and a second magnetic pole layer laminated on the trailing side of the first magnetic pole layer. The first magnetic pole layer includes a tapered portion and a first tip portion. The second magnetic pole layer includes a tapered portion and a second tip portion. A width in a track direction of the second tip portion is smaller than that of the first tip portion. The high-frequency oscillator is between the second tip portion and the trailing shield and includes a width in the track direction substantially equal to the width in the track direction of the second tip portion, and a height of the first tip portion is taller than that of the second tip portion.

摘要翻译： 根据一个实施例，记录头的主极包括层叠在第一磁极层的后侧上的第一磁极层和第二磁极层。 第一磁极层包括锥形部分和第一末端部分。 第二磁极层包括锥形部分和第二尖端部分。 第二前端部的轨道方向的宽度小于第一前端部的宽度。 所述高频振荡器位于所述第二前端部与所述后屏蔽之间，并且包括所述轨道方向上的宽度大致等于所述第二前端部的轨道方向的宽度，所述第一前端部的高度高于所述第二前端部的高度。 的第二尖端部分。

公开(公告)号：US08553359B2

公开(公告)日：2013-10-08

申请号：US12853690

申请日：2010-08-10

申请人： Kenichiro Yamada ,  Katsuhiko Koui ,  Mariko Kitazaki ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Soichi Oikawa ,  Akihiko Takeo

发明人： Kenichiro Yamada ,  Katsuhiko Koui ,  Mariko Kitazaki ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Soichi Oikawa ,  Akihiko Takeo

IPC分类号： G11B5/127

CPC分类号： G11B5/3116 ,  B82Y10/00 ,  G11B5/11 ,  G11B5/315 ,  G11B5/743

摘要： A magnetic recording head includes a magnetic pole, a spin torque oscillator, a first shield and a second shield. The magnetic pole has an air-bearing surface. The spin torque oscillator is provided so that a first side of the spin torque oscillator faces the magnetic pole in a first direction parallel to the air-bearing surface. The first shield includes a granular magnetic material, and is provided so that two portions of the first shield sandwich the spin torque oscillator in a second direction which is parallel to the air-bearing surface and perpendicular to the first direction. The second shield is provided on a second side of the spin torque oscillator opposite to the first side.

摘要翻译： 磁记录头包括磁极，自旋转矩振荡器，第一屏蔽和第二屏蔽。 磁极具有空气轴承表面。 旋转扭矩振荡器被设置成使得旋转扭矩振荡器的第一侧在平行于空气轴承表面的第一方向上面对磁极。 第一屏蔽包括颗粒状磁性材料，并且被设置成使得第一屏蔽的两个部分在平行于空气轴承表面并垂直于第一方向的第二方向上夹住旋转扭矩振荡器。 第二屏蔽设置在与第一侧相反的自旋扭矩振荡器的第二侧上。

公开(公告)号：US20130148242A1

公开(公告)日：2013-06-13

申请号：US13585316

申请日：2012-08-14

申请人： Katsuhiko KOUI ,  Mariko KITAZAKI ,  Shuichi MURAKAMI ,  Kenichiro YAMADA

发明人： Katsuhiko KOUI ,  Mariko KITAZAKI ,  Shuichi MURAKAMI ,  Kenichiro YAMADA

IPC分类号： G11B5/127

CPC分类号： G11B5/3146 ,  G11B5/1278 ,  G11B2005/0029

摘要： According to one embodiment, a magnetic recording head includes a spin-torque oscillator between a main pole and a trailing shield. An oscillation layer of the spin-torque oscillator is formed by repeatedly stacking two or more laminates each including a metallic magnetic layer of a body-centered cubic crystalline metal and a metallic magnetic layer containing cobalt. The film thickness of each metallic magnetic layer is more than 0.2 nm and not more than 3 nm. The intensity of an anisotropic magnetic field is higher than a value obtained by subtracting the intensity of a gap magnetic field from the intensity of a diamagnetic field and lower than the intensity of the diamagnetic field.

摘要翻译： 根据一个实施例，磁记录头包括在主极和后屏蔽之间的自旋扭矩振荡器。 自旋转矩振荡器的振荡层通过重复地堆叠两个或更多个层叠体形成，每个层叠体包括体心立方晶体金属的金属磁性层和含有钴的金属磁性层。 每个金属磁性层的膜厚大于0.2nm且不大于3nm。 各向异性磁场的强度高于从抗磁场的强度减去间隙磁场的强度而低于抗磁场的强度所获得的值。

公开(公告)号：US08238058B2

公开(公告)日：2012-08-07

申请号：US12737691

申请日：2011-02-07

申请人： Mariko Shimizu ,  Hitoshi Iwasaki ,  Kenichiro Yamada ,  Katsuhiko Koui ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Soichi Oikawa

发明人： Mariko Shimizu ,  Hitoshi Iwasaki ,  Kenichiro Yamada ,  Katsuhiko Koui ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Soichi Oikawa

IPC分类号： G11B5/127

CPC分类号： G11B5/02 ,  G11B5/1278 ,  G11B5/314 ,  G11B2005/0005 ,  G11B2005/0024

摘要： According to one embodiment, a magnetic recording head includes a main magnetic pole, a shield, and a stacked structure body. The shield is provided to oppose the main magnetic pole. The stacked structure body is provided between the main magnetic pole and the shield. The stacked structure body includes a first magnetic layer, a second magnetic layer, and an intermediate layer. The first magnetic layer has coercivity lower than a magnetic field applied from the main magnetic pole. A size of a film surface of the second magnetic layer is larger than a size of a film surface of the first magnetic layer. The intermediate layer is provided between the first magnetic layer and the second magnetic layer and is made of a nonmagnetic material. A current is configured to pass between the first magnetic layer and the second magnetic layer.

摘要翻译： 根据一个实施例，磁记录头包括主磁极，屏蔽和堆叠结构体。 提供屏蔽以与主磁极相对。 堆叠结构体设置在主磁极和屏蔽之间。 叠层结构体包括第一磁性层，第二磁性层和中间层。 第一磁性层具有低于从主磁极施加的磁场的矫顽力。 第二磁性层的膜表面的尺寸大于第一磁性层的膜表面的尺寸。 中间层设置在第一磁性层和第二磁性层之间，并且由非磁性材料制成。 电流配置成在第一磁性层和第二磁性层之间通过。

公开(公告)号：US20120182646A1

公开(公告)日：2012-07-19

申请号：US13431004

申请日：2012-03-27

申请人： Tomoko Taguchi ,  Tomomi Funayama ,  Yuka Aoyagi ,  Katsuhiko Koui

发明人： Tomoko Taguchi ,  Tomomi Funayama ,  Yuka Aoyagi ,  Katsuhiko Koui

IPC分类号： G11B5/127 ,  G11B5/54 ,  G11B5/11

CPC分类号： G11B5/3143 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315

摘要： According to one embodiment, a perpendicular magnetic recording head includes a main pole which generates a recording magnetic field, a return pole which forms a closed magnetic circuit for the recording magnetic field, and a side shield magnetically spaced from the main pole in a cross-track direction in which a point on a trailing edge of the side shield which is closest to the main pole is positioned on a leading side of a trailing edge of the main pole.

摘要翻译： 根据一个实施例，垂直磁记录头包括产生记录磁场的主极，形成用于记录磁场的闭合磁路的返回极，以及在横截面中与主极磁隔离的侧屏蔽， 轨道方向，其中最靠近主极的侧护板的后缘上的点位于主杆的后缘的前侧。