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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
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。
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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
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。
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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
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。
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4.发明授权Apparatus for assisting write operation using high frequency magnetic field in disk drive 有权用于通过磁盘驱动器中的高频磁场辅助写入操作的装置公开(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。
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公开(公告)号：US20090080120A1
公开(公告)日：2009-03-26
申请号：US12232392
申请日：2008-09-16
申请人： Tomomi Funayama , Kenichiro Yamada , Masayuki Takagishi , Masahiro Takashita , Mariko Shimizu , Junichi Akiyama , Hitoshi Iwasaki
发明人： Tomomi Funayama , Kenichiro Yamada , Masayuki Takagishi , Masahiro Takashita , Mariko Shimizu , Junichi Akiyama , Hitoshi Iwasaki
IPC分类号： G11B5/33
CPC分类号： G11B5/314 , G11B5/02 , G11B5/1278 , G11B2005/0005 , G11B2005/0024
摘要： It is made possible to provide a magnetic head that generates a sufficient high-frequency magnetic field for assisting recording operations, and a magnetic recording device that includes the magnetic head. A magnetic head includes: a recording magnetic pole; a return yoke magnetically coupled to the recording magnetic pole; and at least two spin torque oscillators provided near the recording magnetic pole.
摘要翻译： 可以提供一种产生用于辅助记录操作的足够的高频磁场的磁头和包括磁头的磁记录装置。 磁头包括：记录磁极; 磁耦合到记录磁极的返回磁轭; 以及设置在记录磁极附近的至少两个自旋扭矩振荡器。
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公开(公告)号：US20090080105A1
公开(公告)日：2009-03-26
申请号：US12232391
申请日：2008-09-16
申请人： Masahiro Takashita , Hitoshi Iwasaki , Kenichiro Yamada , Junichi Akiyama , Masayuki Takagishi , Tomomi Funayama , Mariko Shimizu
发明人： Masahiro Takashita , Hitoshi Iwasaki , Kenichiro Yamada , Junichi Akiyama , Masayuki Takagishi , Tomomi Funayama , Mariko Shimizu
CPC分类号： G11B5/314 , G11B5/02 , G11B5/1278 , G11B2005/0005 , G11B2005/0024
摘要： It is made possible to provide a magnetic head that can stabilize the high-frequency magnetic field generated from the spin torque oscillator. A magnetic head includes: first and second main magnetic poles; and a spin torque oscillator provided between the first and second main magnetic poles.
摘要翻译： 可以提供一种能够稳定由自旋转矩振荡器产生的高频磁场的磁头。 磁头包括：第一和第二主磁极; 以及设置在第一和第二主磁极之间的自旋扭矩振荡器。
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公开(公告)号：US20080304176A1
公开(公告)日：2008-12-11
申请号：US12155473
申请日：2008-06-04
申请人： Masayuki Takagishi , Kenichiro Yamada , Hitoshi Iwasaki , Junichi Akiyama , Tomomi Funayama , Masahiro Takashita , Mariko Shimizu
发明人： Masayuki Takagishi , Kenichiro Yamada , Hitoshi Iwasaki , Junichi Akiyama , Tomomi Funayama , Masahiro Takashita , Mariko Shimizu
CPC分类号： G11B5/1278 , G11B5/3133 , G11B2005/001
摘要： A magnetic recording head includes a recording magnetic pole, and a spin oscillation device including a first magnetic layer having at least one magnetic material layer, a second magnetic layer having at least one magnetic material layer, and a first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer. The first magnetic layer and the second magnetic layer are antiferromagnetically coupled and/or magnetostatically coupled to each other. The first magnetic layer and the second magnetic layer are laminated in a direction generally parallel to a medium facing surface and generally parallel to a side surface of the recording magnetic pole intersecting with the medium facing surface.
摘要翻译： 磁记录头包括记录磁极，以及包括具有至少一个磁性材料层的第一磁性层，具有至少一个磁性材料层的第二磁性层和设置在第一磁性层之间的第一非磁性层的自旋振荡装置 层和第二磁性层。 第一磁性层和第二磁性层彼此反铁磁耦合和/或静磁耦合。 第一磁性层和第二磁性层沿大致平行于介质相对表面的方向层叠，并且大致平行于与介质相对表面相交的记录磁极的侧表面。
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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
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。
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9.发明申请APPARATUS FOR ASSISTING WRITE OPERATION USING HIGH FREQUENCY MAGNETIC FIELD IN DISK DRIVE 有权用磁盘驱动器中高频磁场辅助写操作的装置公开(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
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。
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公开(公告)号：US20120268844A1
公开(公告)日：2012-10-25
申请号：US13541371
申请日：2012-07-03
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
CPC分类号： G11B5/17 , G11B5/02 , G11B5/1278 , G11B5/3133 , G11B5/3146 , G11B2005/0002 , G11B2005/0024
摘要： An example magnetic writing head includes a main magnetic pole, a coil to generate an ampere magnetic field to magnetize the main magnetic pole to cause the magnetized main magnetic pole to generate a magnetic field, and a laminated body. The laminated body includes a first magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole and a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole.
摘要翻译： 磁性写入头包括主磁极，产生安培磁场以磁化主磁极以使磁化的主磁极产生磁场的线圈和层叠体。 层叠体包括矫顽力低于由主磁极施加的磁场的矫顽力的第一磁性层和具有低于由主磁极施加的磁场的矫顽力的第二磁性层。
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