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公开(公告)号：US20110242701A1
公开(公告)日：2011-10-06
申请号：US13016687
申请日：2011-01-28
CPC分类号： G11B5/1278 , B82Y10/00 , G11B5/02 , G11B5/314 , G11B5/3146 , G11B5/746 , G11B5/82 , G11B2005/0024
摘要： According to one embodiment, a magnetic head includes a main pole configured to apply a perpendicular recording magnetic field to a recording layer of a recording medium, a return pole opposed to the trailing side of the main pole with a write gap therebetween and configured to reflux magnetic flux from the main pole to form a magnetic circuit in conjunction with the main pole, a coil configured to excite magnetic flux in the magnetic circuit includes the main pole and the return pole, a plurality of high-frequency oscillatory elements individually interposed between the main pole and the return pole, includes a plurality of magnetic films different in magnetic resonance frequency, and configured to individually apply high-frequency magnetic fields to the recording medium, and an electrical circuit configured to energize the high-frequency oscillatory elements.
摘要翻译： 根据一个实施例，磁头包括：主极，被配置为向记录介质的记录层施加垂直记录磁场;与主极的后侧相对的返回极，其间具有写入间隙，并且被配置为回流 来自主极的磁通量与主极结合形成磁路，构成为激励磁路中的磁通量的线圈包括主极和返回极，多个高频振荡元件分别插入在 主极和返回极包括不同于磁共振频率的多个磁膜，并且被配置为分别向记录介质施加高频磁场，以及电路，其被配置为对高频振荡元件通电。
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52.发明授权Method and apparatus for controlling head with spin-torque oscillator in a disk drive 有权用于在磁盘驱动器中用自旋扭矩振荡器控制磁头的方法和装置公开(公告)号：US08027118B2
公开(公告)日：2011-09-27
申请号：US12843723
申请日：2010-07-26
申请人： Toru Ezawa , Shuichi Kojima , Masahide Kanegae , Kenichiro Yamada , Katsuhiko Koui , Masayuki Takagishi
发明人： Toru Ezawa , Shuichi Kojima , Masahide Kanegae , Kenichiro Yamada , Katsuhiko Koui , Masayuki Takagishi
IPC分类号： G11B21/02
CPC分类号： G11B5/09 , G11B5/02 , G11B5/1278 , G11B5/314 , G11B2005/0005 , G11B2005/0024 , G11B2220/2516
摘要： According to one embodiment, an apparatus for controlling a head includes a transmitting module and a controller. The transmitting module is configured to transmit a write signal to a magnetic head having a spin torque oscillator at the time of recording data. The controller is configured to supply a drive signal that has a level higher than the ordinary level for a prescribed effective time, to the spin-torque oscillator in response to an input write gate that instructs the recording of data. During a period other than prescribed effective time, the controller supplies a drive signal having the ordinary level to the spin-torque oscillator.
摘要翻译： 根据一个实施例，一种用于控制头部的装置包括发射模块和控制器。 发送模块被配置为在记录数据时向具有自旋转矩振荡器的磁头发送写入信号。 控制器被配置为响应于指示数据记录的输入写入门，向自旋转矩振荡器提供具有高于普通电平的电平达到规定有效时间的驱动信号。 在规定的有效时间以外的期间，控制器向自旋转矩振荡器提供具有普通电平的驱动信号。
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53.发明申请Spin torque oscillator, magnetic recording head, magnetic head assembly and magnetic recording apparatus 有权旋转扭矩振荡器，磁记录头，磁头组件和磁记录装置公开(公告)号：US20100110592A1
公开(公告)日：2010-05-06
申请号：US12591055
申请日：2009-11-05
申请人： Katsuhiko Koui , Mariko Shimizu , Kenichiro Yamada
发明人： Katsuhiko Koui , Mariko Shimizu , Kenichiro Yamada
IPC分类号： G11B5/33
CPC分类号： G11B5/314 , G11B5/02 , G11B5/1278 , G11B2005/0002 , G11B2005/0024
摘要： A spin torque oscillator includes a first magnetic layer, a second magnetic layer and a first nonmagnetic layer. The first magnetic layer includes a magnetic film of a magnetic material with a body-centered cubic (bcc) structure and an oriented {110} plane of the body-centered cubic structure, the oriented {110} plane being oriented substantially parallel to a principal plane of the magnetic film. The first nonmagnetic layer is disposed between the first magnetic layer and the second magnetic layer. In addition, a magnetic moment in the magnetic film precesses around an axis substantially parallel to the principal plane. Furthermore, a magnetic field is applied in a direction substantially perpendicular to the principal plane, and a current is passed perpendicularly to the principal plane.
摘要翻译： 自旋转矩振荡器包括第一磁性层，第二磁性层和第一非磁性层。 第一磁性层包括具有体心立方（bcc）结构的磁性材料和体心立方结构的取向{110}面的磁性膜，取向{110}面取向为基本平行于主体 磁膜的平面。 第一非磁性层设置在第一磁性层和第二磁性层之间。 此外，磁性膜中的磁矩围绕基本平行于主平面的轴线进行。 此外，在基本上垂直于主平面的方向上施加磁场，并且电流垂直于主平面通过。
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54.发明授权Spin torque oscillator, magnetic recording head, magnetic head assembly and magnetic recording apparatus 有权旋转扭矩振荡器，磁记录头，磁头组件和磁记录装置公开(公告)号：US08325442B2
公开(公告)日：2012-12-04
申请号：US12591055
申请日：2009-11-05
申请人： Katsuhiko Koui , Mariko Shimizu , Kenichiro Yamada
发明人： Katsuhiko Koui , Mariko Shimizu , Kenichiro Yamada
IPC分类号： G11B5/33
CPC分类号： G11B5/314 , G11B5/02 , G11B5/1278 , G11B2005/0002 , G11B2005/0024
摘要： A spin torque oscillator includes a first magnetic layer, a second magnetic layer and a first nonmagnetic layer. The first magnetic layer includes a magnetic film of a magnetic material with a body-centered cubic (bcc) structure and an oriented {110} plane of the body-centered cubic structure, the oriented {110} plane being oriented substantially parallel to a principal plane of the magnetic film. The first nonmagnetic layer is disposed between the first magnetic layer and the second magnetic layer. In addition, a magnetic moment in the magnetic film precesses around an axis substantially parallel to the principal plane. Furthermore, a magnetic field is applied in a direction substantially perpendicular to the principal plane, and a current is passed perpendicularly to the principal plane.
摘要翻译： 自旋转矩振荡器包括第一磁性层，第二磁性层和第一非磁性层。 第一磁性层包括具有体心立方（bcc）结构的磁性材料和体心立方结构的取向{110}面的磁性膜，取向{110}面取向为基本平行于主体 磁膜的平面。 第一非磁性层设置在第一磁性层和第二磁性层之间。 此外，磁性膜中的磁矩围绕基本平行于主平面的轴线进行。 此外，在基本上垂直于主平面的方向上施加磁场，并且电流垂直于主平面通过。
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55.发明授权Radio frequency magnetic field assisted recording head, head assembly, amd recording apparatus 有权射频磁场辅助记录头，头组件，amd记录装置公开(公告)号：US08559134B2
公开(公告)日：2013-10-15
申请号：US13325155
申请日：2011-12-14
CPC分类号： G11B5/3146 , G11B5/1278 , G11B5/3143 , G11B2005/0005
摘要： A recording head including a first electrode, a first magnetic layer, a second magnetic layer, a first intermediate layer, a third magnetic layer, a second electrode, and a magnetic pole. A product of saturated magnetization of the first magnetic layer and a lateral area of the first magnetic layer is larger than a product of saturated magnetization of the third magnetic layer and a lateral area of the third magnetic layer.
摘要翻译： 一种记录头，包括第一电极，第一磁性层，第二磁性层，第一中间层，第三磁性层，第二电极和磁极。 第一磁性层的饱和磁化强度和第一磁性层的横向面积的乘积大于第三磁性层的饱和磁化强度和第三磁性层的横向面积的乘积。
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56.发明申请公开(公告)号：US20080268291A1
公开(公告)日：2008-10-30
申请号：US12109760
申请日：2008-04-25
IPC分类号： G11B5/127
CPC分类号： G11B5/314 , G11B5/02 , G11B5/1278 , G11B2005/0002 , G11B2005/0024 , Y10T428/115
摘要： A magnetic device includes a first magnetic layer having at least one magnetic material layer, a second magnetic layer having at least one magnetic material layer, a first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer, a third magnetic layer including a ferromagnetic material with a fixed magnetization direction, and a pair of electrodes. The pair of electrodes are operable to pass a current through a laminated body including the first and second magnetic layers, the nonmagnetic layer, and the third magnetic layer.
摘要翻译： 磁性装置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，设置在第一磁性层和第二磁性层之间的第一非磁性层，第三磁性层， 具有固定磁化方向的铁磁材料和一对电极。 一对电极可操作以使电流通过包括第一和第二磁性层，非磁性层和第三磁性层的层叠体。
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57.发明授权公开(公告)号：US08767346B2
公开(公告)日：2014-07-01
申请号：US12591752
申请日：2009-11-30
IPC分类号： G11B5/17
CPC分类号： G11B5/09 , G11B5/1278 , G11B5/3123 , G11B5/3133 , G11B5/35 , G11B20/10222 , G11B2005/001
摘要： A magnetic recording head includes a first magnetic pole, a second magnetic pole, a spin torque oscillator, a first coil, a second coil, and a third coil. The first magnetic pole applies a recording magnetic field to a magnetic recording medium. The second magnetic pole is provided parallel to the first magnetic pole. At least a portion of the spin torque oscillator is provided between the first magnetic pole and the second magnetic pole. The first coil magnetizes the first magnetic pole. A current is passed through the second coil independently of the first coil. A current is passed through the third coil independently of both the first coil and the second coil.
摘要翻译： 磁记录头包括第一磁极，第二磁极，自旋扭矩振荡器，第一线圈，第二线圈和第三线圈。 第一磁极将记录磁场施加到磁记录介质。 第二磁极平行于第一磁极设置。 至少一部分自旋扭矩振荡器设置在第一磁极和第二磁极之间。 第一线圈磁化第一磁极。 独立于第一线圈的电流通过第二线圈。 独立于第一线圈和第二线圈两者都经过第三线圈。
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58.发明申请公开(公告)号：US20120243127A1
公开(公告)日：2012-09-27
申请号：US13239496
申请日：2011-09-22
CPC分类号： G11B5/3906 , G01R33/093 , G11B5/1278 , G11B2005/0002 , G11B2005/0008 , H01F10/3254 , H01F10/3272 , H01F10/3286 , H01F10/329 , H01L43/08 , Y10T428/11
摘要： According to one embodiment, a magnetic head includes a reproducing section. The reproducing section detects a medium magnetic field recorded in a magnetic recording medium. The reproducing section includes a stacked film and a magnetic field application unit. The stacked film includes a first magnetization layer and a second magnetization layer. The first magnetization layer has a perpendicular magnetic anisotropy. A magnetization of the first magnetization layer being is fixed. The second magnetization layer is stacked with the first magnetization layer and oscillates. The magnetic field application unit is stacked with the stacked film and applies a bias magnetic field having a component along the first axis to the stacked film. A resistance of the stacked film changes in accordance with the medium magnetic field when a current not less than a value at which the second magnetization layer oscillates is passed.
摘要翻译： 根据一个实施例，磁头包括再现部分。 再现部分检测记录在磁记录介质中的介质磁场。 再现部分包括堆叠膜和磁场施加单元。 层叠膜包括第一磁化层和第二磁化层。 第一磁化层具有垂直的磁各向异性。 第一磁化层的磁化是固定的。 第二磁化层与第一磁化层堆叠并振荡。 磁场施加单元与层叠的膜堆叠，并且将具有沿着第一轴的分量的偏置磁场施加到堆叠的膜。 当不小于第二磁化层振荡的值的电流通过时，堆叠膜的电阻根据中等磁场而变化。
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公开(公告)号：US08264799B2
公开(公告)日：2012-09-11
申请号：US12109760
申请日：2008-04-25
IPC分类号： G11B5/33
CPC分类号： G11B5/314 , G11B5/02 , G11B5/1278 , G11B2005/0002 , G11B2005/0024 , Y10T428/115
摘要： A magnetic device includes a first magnetic layer having at least one magnetic material layer, a second magnetic layer having at least one magnetic material layer, a first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer, a third magnetic layer including a ferromagnetic material with a fixed magnetization direction, and a pair of electrodes. The pair of electrodes are operable to pass a current through a laminated body including the first and second magnetic layers, the nonmagnetic layer, and the third magnetic layer.
摘要翻译： 磁性装置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，设置在第一磁性层和第二磁性层之间的第一非磁性层，第三磁性层， 具有固定磁化方向的铁磁材料和一对电极。 一对电极可操作以使电流通过包括第一和第二磁性层，非磁性层和第三磁性层的层叠体。
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60.发明申请公开(公告)号：US20100134922A1
公开(公告)日：2010-06-03
申请号：US12591752
申请日：2009-11-30
IPC分类号： G11B5/17
CPC分类号： G11B5/09 , G11B5/1278 , G11B5/3123 , G11B5/3133 , G11B5/35 , G11B20/10222 , G11B2005/001
摘要： A magnetic recording head includes a first magnetic pole, a second magnetic pole, a spin torque oscillator, a first coil, a second coil, and a third coil. The first magnetic pole applies a recording magnetic field to a magnetic recording medium. The second magnetic pole is provided parallel to the first magnetic pole. At least a portion of the spin torque oscillator is provided between the first magnetic pole and the second magnetic pole. The first coil magnetizes the first magnetic pole. A current is passed through the second coil independently of the first coil. A current is passed through the third coil independently of both the first coil and the second coil.
摘要翻译： 磁记录头包括第一磁极，第二磁极，自旋扭矩振荡器，第一线圈，第二线圈和第三线圈。 第一磁极将记录磁场施加到磁记录介质。 第二磁极平行于第一磁极设置。 至少一部分自旋扭矩振荡器设置在第一磁极和第二磁极之间。 第一线圈磁化第一磁极。 独立于第一线圈的电流通过第二线圈。 独立于第一线圈和第二线圈两者都经过第三线圈。
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