公开(公告)号：US20120275060A1

公开(公告)日：2012-11-01

申请号：US13545601

申请日：2012-07-10

申请人： Mariko Shimizu ,  Hitoshi Iwasaki ,  Kenichiro Yamada ,  Junichi Akiyama ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita

发明人： Mariko Shimizu ,  Hitoshi Iwasaki ,  Kenichiro Yamada ,  Junichi Akiyama ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita

IPC分类号： G11B5/127 ,  G11B5/33

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

摘要： An example magnetic head includes a recording magnetic pole to generate a recording magnetic field; a spin torque oscillator formed in the vicinity of the recording magnetic pole; and a hard bias film for applying a magnetic field to the spin torque oscillator.

摘要翻译： 示例磁头包括用于产生记录磁场的记录磁极; 形成在记录磁极附近的自旋转矩振荡器; 以及用于向自旋转矩振荡器施加磁场的硬偏置膜。

公开(公告)号：US20100073806A1

公开(公告)日：2010-03-25

申请号：US12585459

申请日：2009-09-15

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

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

IPC分类号： G11B21/02 ,  G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/02 ,  G11B5/3133 ,  G11B5/3146 ,  G11B2005/0002 ,  H03B15/006

摘要： It is made possible to improve the recording resolution. A magnetic recording head includes: a magnetic pole that has a first magnetic portion including an air bearing surface, and generates a write magnetic field; and a spin torque oscillator that is formed on the air bearing surface of the magnetic pole, and is formed with a stack structure including a first magnetic layer, a second magnetic layer, and a nonmagnetic layer interposed between the first magnetic layer and the second magnetic layer, the second magnetic layer generating a high-frequency magnetic field when current is applied between the first magnetic layer and the second magnetic layer.

摘要翻译： 可以提高记录分辨率。 磁记录头包括：具有包括空气轴承表面的第一磁性部分并产生写入磁场的磁极; 以及旋转扭矩振荡器，其形成在所述磁极的所述空气支承面上，并且形成有堆叠结构，所述堆叠结构包括介于所述第一磁性层和所述第二磁性层之间的第一磁性层，第二磁性层和非磁性层 层，当第一磁性层和第二磁性层之间施加电流时，第二磁性层产生高频磁场。

公开(公告)号：US20100027158A1

公开(公告)日：2010-02-04

申请号：US12461027

申请日：2009-07-29

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

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

IPC分类号： G11B5/596 ,  G11B5/127

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

摘要： A magnetic recording head includes: a magnetic pole; a magnetic shield forming a magnetic circuit with the magnetic pole; and a spin torque oscillator provided between the magnetic pole and the magnetic shield, and formed with a stack structure including a first magnetic layer, a second magnetic layer, and an intermediate layer interposed between the first magnetic layer and the second magnetic layer. The first magnetic layer is made of a magnetic material of 200 Oe or smaller in coercive force. A cross-sectional area of the first magnetic layer in a direction perpendicular to a stack layer face of the first magnetic layer is four or more times greater than a cross-sectional area of the second magnetic layer in a direction perpendicular to a stack layer face of the second magnetic layer.

摘要翻译： 磁记录头包括：磁极; 与磁极形成磁路的磁屏蔽; 以及设置在所述磁极和所述磁屏蔽之间的自旋扭矩振荡器，并且形成有包括第一磁性层，第二磁性层和介于所述第一磁性层和所述第二磁性层之间的中间层的堆叠结构。 第一磁性层由矫顽力为200Oe或更小的磁性材料制成。 第一磁性层在与第一磁性层的堆叠层面垂直的方向上的横截面积比第二磁性层在垂直于堆叠层面的方向的横截面积大四倍以上 的第二磁性层。

公开(公告)号：US20090059417A1

公开(公告)日：2009-03-05

申请号：US12196628

申请日：2008-08-22

申请人： Akihiko Takeo ,  Junichi Akiyama ,  Kenichiro Yamada ,  Hitoshi Iwasaki ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Mariko Shimizu

发明人： Akihiko Takeo ,  Junichi Akiyama ,  Kenichiro Yamada ,  Hitoshi Iwasaki ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Mariko Shimizu

IPC分类号： G11B21/02 ,  G11B5/33

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

摘要： According to one embodiment, a disk drive having a spin torque oscillator and designed to perform high frequency assisted writing. The disk drive has a magnetic disk, a magnetic head, a coil, and a drive current controller. The drive current controller controls a drive current to supply to the spin torque oscillator. To record data magnetically in the disk, the drive current controller supplies to the spin torque oscillator the drive current that changes in synchronism with the polarity inversion of the recording current supplied to the coil, which excites the recording magnetic pole of the magnetic head.

摘要翻译： 根据一个实施例，一种具有自旋扭矩振荡器并被设计成执行高频辅助写入的盘驱动器。 磁盘驱动器具有磁盘，磁头，线圈和驱动电流控制器。 驱动电流控制器控制驱动电流供应到自旋扭矩振荡器。 为了将数据磁性地记录在盘中，驱动电流控制器向旋转转矩振荡器提供驱动电流，该驱动电流与提供给线圈的记录电流的极性反转同步地变化，这激励磁头的记录磁极。

公开(公告)号：US08400734B2

公开(公告)日：2013-03-19

申请号：US13214012

申请日：2011-08-19

申请人： Kenichiro Yamada ,  Hitoshi Iwasaki ,  Junichi Akiyama ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Mariko Shimizu ,  Shuichi Murakami ,  Tadashi Kai

发明人： Kenichiro Yamada ,  Hitoshi Iwasaki ,  Junichi Akiyama ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Mariko Shimizu ,  Shuichi Murakami ,  Tadashi Kai

IPC分类号： G11B5/147 ,  G11B5/23 ,  G11B5/187

CPC分类号： G01S19/36 ,  G01S19/30 ,  Y10T428/1186

摘要： An example magnetic recording head includes: a main magnetic pole; a laminated body; and a pair of electrodes. The laminated body includes a first magnetic layer having a coercivity lower than magnetic field applied by the main magnetic pole, a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. The pair of electrodes is operable to pass a current through the laminated body.

摘要翻译： 一个示例磁记录头包括：主磁极; 层压体; 和一对电极。 层叠体包括具有比由主磁极施加的磁场低的矫顽力的第一磁性层，具有低于由主磁极施加的磁场的矫顽力的第二磁性层，以及设置在第一磁性体之间的中间层 层和第二磁性层。 该对电极可操作以使电流通过层压体。

公开(公告)号：US08320079B2

公开(公告)日：2012-11-27

申请号：US12457657

申请日：2009-06-17

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

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

IPC分类号： G11B5/127 ,  G11B5/187

CPC分类号： B82Y10/00 ,  B82Y25/00 ,  G11B5/3906 ,  G11B2005/0005 ,  G11B2005/3996

摘要： It is made possible to reduce the write magnetic field generated from the main magnetic pole toward the spin torque oscillator, so as to reduce the variation in the oscillation characteristics of the spin torque oscillator, and reduce the current required for oscillation. The magnetic head assembly includes: a recording magnetic pole; a spin torque oscillator that has first and second magnetic layers, and an intermediate layer interposed between the first and second magnetic layers, the spin torque oscillator generating a high-frequency magnetic field by applying a current between the first and second magnetic layers; and a third magnetic layer that is placed adjacent to at least part of a side face of the second magnetic layer.

摘要翻译： 可以将从主磁极产生的写入磁场减小到自旋转矩振荡器，从而减小自旋转矩振荡器的振荡特性的变化，并且降低振荡所需的电流。 磁头组件包括：记录磁极; 旋转扭矩振荡器，其具有第一和第二磁性层，以及介于所述第一和第二磁性层之间的中间层，所述自旋扭矩振荡器通过在所述第一和第二磁性层之间施加电流而产生高频磁场; 以及与第二磁性层的侧面的至少一部分相邻配置的第三磁性层。

公开(公告)号：US08238060B2

公开(公告)日：2012-08-07

申请号：US12780269

申请日：2010-05-14

申请人： Kenichiro Yamada ,  Hitoshi Iwasaki ,  Junichi Akiyama ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Mariko Shimizu ,  Shuichi Murakami ,  Tadashi Kai

发明人： Kenichiro Yamada ,  Hitoshi Iwasaki ,  Junichi Akiyama ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Mariko Shimizu ,  Shuichi Murakami ,  Tadashi Kai

IPC分类号： G11B5/147 ,  G11B5/23 ,  G11B5/187

CPC分类号： G11B5/17 ,  G11B5/02 ,  G11B5/1278 ,  G11B5/3133 ,  G11B5/3146 ,  G11B2005/0002 ,  G11B2005/0024

摘要： A magnetic recording head includes: a main magnetic pole; a laminated body; and a pair of electrodes. The laminated body includes a first magnetic layer having a coercivity lower than magnetic field applied by the main magnetic pole, a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. The pair of electrodes are operable to pass a current through the laminated body.

摘要翻译： 磁记录头包括：主磁极; 层压体; 和一对电极。 层叠体包括具有比由主磁极施加的磁场低的矫顽力的第一磁性层，具有低于由主磁极施加的磁场的矫顽力的第二磁性层，以及设置在第一磁性体之间的中间层 层和第二磁性层。 该对电极可操作以使电流通过层叠体。

公开(公告)号：US08139322B2

公开(公告)日：2012-03-20

申请号：US12153490

申请日：2008-05-20

申请人： Kenichiro Yamada ,  Hitoshi Iwasaki ,  Junichi Akiyama ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Mariko Shimizu

发明人： Kenichiro Yamada ,  Hitoshi Iwasaki ,  Junichi Akiyama ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Mariko Shimizu

IPC分类号： G11B5/31 ,  G11B5/235 ,  G11B5/39

CPC分类号： G11B5/02 ,  G11B5/1278 ,  G11B5/314 ,  G11B5/3153 ,  G11B2005/0002

摘要： A magnetic recording head includes: a main magnetic pole; a laminated body; and a pair of electrodes operable to pass a current through the laminated body. The laminated body includes a first magnetic layer, a second magnetic layer, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. A lamination direction of the laminated body is substantially parallel to a medium moving direction. In a first direction parallel to an air bearing surface and perpendicular to the lamination direction, the laminated body has a protruding portion that protrudes beyond an end of a surface of the main magnetic pole facing the laminated body.

摘要翻译： 磁记录头包括：主磁极; 层压体; 以及可操作以使电流通过层叠体的一对电极。 层叠体包括第一磁性层，第二磁性层和设置在第一磁性层和第二磁性层之间的中间层。 层叠体的层叠方向大致平行于介质移动方向。 在平行于空气轴承面并与层叠方向垂直的第一方向上，层叠体具有突出部，该突出部突出超过面对层叠体的主磁极的表面的端部。

公开(公告)号：US07791829B2

公开(公告)日：2010-09-07

申请号：US12196628

申请日：2008-08-22

申请人： Akihiko Takeo ,  Junichi Akiyama ,  Kenichiro Yamada ,  Hitoshi Iwasaki ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Mariko Shimizu

发明人： Akihiko Takeo ,  Junichi Akiyama ,  Kenichiro Yamada ,  Hitoshi Iwasaki ,  Masayuki Takagishi ,  Tomomi Funayama ,  Masahiro Takashita ,  Mariko Shimizu

IPC分类号： G11B5/02

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

摘要： According to one embodiment, a disk drive having a spin torque oscillator and designed to perform high frequency assisted writing. The disk drive has a magnetic disk, a magnetic head, a coil, and a drive current controller. The drive current controller controls a drive current to supply to the spin torque oscillator. To record data magnetically in the disk, the drive current controller supplies to the spin torque oscillator the drive current that changes in synchronism with the polarity inversion of the recording current supplied to the coil, which excites the recording magnetic pole of the magnetic head.

摘要翻译： 根据一个实施例，一种具有自旋扭矩振荡器并被设计成执行高频辅助写入的盘驱动器。 磁盘驱动器具有磁盘，磁头，线圈和驱动电流控制器。 驱动电流控制器控制驱动电流供应到自旋扭矩振荡器。 为了将数据磁性地记录在盘中，驱动电流控制器向旋转转矩振荡器提供驱动电流，该驱动电流与提供给线圈的记录电流的极性反转同步地变化，这激励磁头的记录磁极。

公开(公告)号：US20100027161A1

公开(公告)日：2010-02-04

申请号：US12512237

申请日：2009-07-30

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

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

IPC分类号： G11B5/127

CPC分类号： G11B5/314 ,  G11B2005/001 ,  G11B2005/0024

摘要： A magnetic recording apparatus includes a magnetic recording head having a magnetic pole and a spin torque oscillator, the spin torque oscillator being placed adjacent to the magnetic pole and includes at least two magnetic layers of a first magnetic layer and a second magnetic layer, and a magnetic recording medium includes two magnetic layers of a recording layer and an antenna layer, the recording layer including a hard magnetic material, such that the antenna layer is formed closer to the magnetic recording head than the recording layer, in which the antenna layer has a resonance frequency fa lower than a resonance frequency fr of the recording layer, greater than a resonance frequency of the second magnetic layer, and the recording layer and the antenna layer are ferromagnetically coupled to each other.

摘要翻译： 磁记录装置包括具有磁极和自旋扭矩振荡器的磁记录头，该旋转扭矩振荡器被放置成与磁极相邻，并且包括至少两个第一磁性层和第二磁性层的磁性层，以及 磁记录介质包括记录层和天线层的两个磁性层，记录层包括硬磁性材料，使得天线层比记录层更靠近磁记录头，其中天线层具有 谐振频率fa低于记录层的谐振频率fr，大于第二磁性层的共振频率，并且记录层和天线层彼此铁磁耦合。