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1. 发明授权

US08947170B2 Spin-torque oscillator 有权
标题翻译：旋转扭矩振荡器
公开(公告)号：US08947170B2
公开(公告)日：2015-02-03
申请号：US13605093
申请日：2012-09-06
申请人： Tao Yang , Kiwamu Kudo , Tazumi Nagasawa , Hirofumi Suto , Rie Sato , Koichi Mizushima
发明人： Tao Yang , Kiwamu Kudo , Tazumi Nagasawa , Hirofumi Suto , Rie Sato , Koichi Mizushima
IPC分类号： H03B17/00 , H03B15/00 , G11B5/31 , H01F7/02
CPC分类号： H03B15/006 , G11B5/3143 , H01F7/0278
摘要： According to one embodiment, a spin-torque oscillator includes a non-magnetic unit, one or more first magnetic unit, and a second magnetic unit. The non-magnetic unit is formed of a non-magnetic body. The one or more first magnetic unit is connected to the non-magnetic unit and generates a pure spin current indicating the flow of the electron spin that does not accompany an electric charge current. The second magnetic unit is connected to the non-magnetic unit in a manner such that a distance between the second magnetic unit and the first magnetic unit is shorter than a spin diffusion length indicating a distance that an electronic spin polarization is maintained in the non-magnetic unit. The second magnetic unit oscillates by the pure spin current.
摘要翻译：根据一个实施例，自旋扭矩振荡器包括非磁性单元，一个或多个第一磁性单元和第二磁性单元。非磁性单元由非磁性体形成。一个或多个第一磁性单元连接到非磁性单元并产生指示不伴随电荷电流的电子自旋流动的纯自旋电流。第二磁性单元以非磁性单元连接到第二磁性单元和第一磁性单元之间的距离短于指示电子自旋极化保持在非磁性单元中的距离的自旋扩散长度，磁单元。第二磁单元通过纯自旋电流振荡。

2. 发明授权

US08724261B2 High-frequency magnetic field generation element and magnetic head 有权
标题翻译：高频磁场发生元件和磁头
公开(公告)号：US08724261B2
公开(公告)日：2014-05-13
申请号：US13678062
申请日：2012-11-15
申请人： Hirofumi Suto , Tao Yang , Tazumi Nagasawa , Kiwamu Kudo , Rie Sato , Koichi Mizushima
发明人： Hirofumi Suto , Tao Yang , Tazumi Nagasawa , Kiwamu Kudo , Rie Sato , Koichi Mizushima
IPC分类号： G11B5/31
CPC分类号： G11B5/187 , G11B5/3146 , G11B2005/0024 , H01F7/00 , H01F10/3263 , H01F10/3286 , H01F10/329 , H01L43/08
摘要： According to one embodiment, a high-frequency magnetic field generation element includes a first fixed layer, a first free layer, and a second free layer. A direction of a magnetization of the first fixed layer is fixed and has a component parallel to a first direction. A direction of a magnetization of the first free layer is variable and has a component orthogonal to the first direction. A direction of a magnetization of the second free layer is variable and has a component orthogonal to the first direction. The first fixed layer is provided between the first free layer and the second free layer. The magnetizations of the first free layer and the second free layer oscillate. A rotation direction of the magnetization of the first free layer is opposite to a rotation direction of the magnetization of the second free layer.
摘要翻译：根据一个实施例，高频磁场产生元件包括第一固定层，第一自由层和第二自由层。第一固定层的磁化方向固定，并且具有平行于第一方向的分量。第一自由层的磁化方向是可变的并且具有与第一方向垂直的分量。第二自由层的磁化方向是可变的并且具有与第一方向垂直的分量。第一固定层设置在第一自由层和第二自由层之间。第一自由层和第二自由层的磁化振荡。第一自由层的磁化的旋转方向与第二自由层的磁化的旋转方向相反。

3. 发明授权

US08630070B2 Magnetic head 有权
标题翻译：磁头
公开(公告)号：US08630070B2
公开(公告)日：2014-01-14
申请号：US13207802
申请日：2011-08-11
申请人： Rie Sato , Koichi Mizushima
发明人： Rie Sato , Koichi Mizushima
IPC分类号： G11B5/33
CPC分类号： G11B5/3903 , G01R33/098 , G11B2005/0024 , H01F10/3254 , H01F10/329
摘要： According to one embodiment, there is provided a magnetic head for a three-dimensional magnetic recording/reproducing apparatus, the head executing reading from or writing to a recording medium, utilizing a magnetic resonance, the medium including stacked layers formed of magnetic substances having different resonance frequencies, the head comprising a spin torque oscillation unit and auxiliary magnetic poles. The unit is operable to simultaneously oscillate at a plurality of frequencies to cause the magnetic resonance, when reading or writing. The magnetic poles assist the unit, when reading or writing. Further, according to another embodiment, there is provided a recording magnetic head using a high-frequency assist method and comprising a microwave magnetic field applying unit and a recording magnetic pole. The unit executes writing to a recording medium, and is formed of a plurality of spin torque oscillation elements having phases thereof synchronized. The magnetic pole assists the writing.
摘要翻译：根据一个实施例，提供了一种用于三维磁记录/再现装置的磁头，头部利用磁共振来执行从记录介质的读取或向记录介质写入，该介质包括由具有不同的磁性物质形成的层叠层谐振频率，头部包括自旋扭矩振荡单元和辅助磁极。该单元可操作以在读取或写入时以多个频率同时振荡以引起磁共振。当阅读或写入时，磁极帮助单元。此外，根据另一实施例，提供了一种使用高频辅助方法并包括微波磁场施加单元和记录磁极的记录磁头。该单元对记录介质执行写入，并且由其相位同步的多个自旋转矩振荡元件形成。磁极帮助写作。

4. 发明申请

US20130065086A1 REPRODUCING HEAD WITH SPIN-TORQUE OSCILLATOR, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS 有权
标题翻译：用旋转振荡器复制头，磁记录和再现装置
公开(公告)号：US20130065086A1
公开(公告)日：2013-03-14
申请号：US13535785
申请日：2012-06-28
申请人： Kiwamu Kudo , Tazumi Nagasawa , Koichi Mizushima , Rie Sato , Tao Yang , Hirofumi Suto
发明人： Kiwamu Kudo , Tazumi Nagasawa , Koichi Mizushima , Rie Sato , Tao Yang , Hirofumi Suto
IPC分类号： G11B5/33
CPC分类号： G11B5/3903 , G01R33/098 , G01R33/1284 , G11B5/3912 , G11B5/3929 , G11B2005/0002 , H01F10/325 , H01F10/3254 , H01F10/329 , H01F41/325 , Y10T428/1171
摘要： According to one embodiment, a reproducing head includes a spin-torque oscillator and a pair of shield parts. The spin-torque oscillator has a first surface facing a magnetic recording medium. The pair of shield parts each has a second surface facing the magnetic recording medium, the spin-torque oscillator being arranged between the shield parts. A distance between the second surface and the magnetic recording medium is shorter than a distance between the first surface and the magnetic recording medium.
摘要翻译：根据一个实施例，再现头包括自旋扭矩振荡器和一对屏蔽部分。自旋扭矩振荡器具有面向磁记录介质的第一表面。一对屏蔽部分各自具有面向磁记录介质的第二表面，该自旋扭矩振荡器布置在屏蔽部分之间。第二表面和磁记录介质之间的距离比第一表面和磁记录介质之间的距离短。

5. 发明申请

US20120032763A1 MAGNETIC OSCILLATION ELEMENT 有权
标题翻译：磁振荡元件
公开(公告)号：US20120032763A1
公开(公告)日：2012-02-09
申请号：US13216968
申请日：2011-08-24
申请人： Kiwamu KUDO , Koichi Mizushima , Tazumi Nagasawa , Rie Sato
发明人： Kiwamu KUDO , Koichi Mizushima , Tazumi Nagasawa , Rie Sato
IPC分类号： H01F7/00
CPC分类号： H03B15/006 , H01L43/08
摘要： According to one embodiment, magnetization directions of a magnetic free layer and a magnetic pinned layer are parallel to junction planes between the magnetic free layer and a spacer layer and between the magnetic pinned layer and the spacer layer. The magnetic free layer has a uniaxial magnetic anisotropy, and generates a magnetization oscillation when a current larger than an oscillation threshold current flows through the magnetic free layer. A magnetic field generator controls a magnitude and a direction of an external magnetic field to cancel a shift amount of an oscillation frequency caused by a diamagnetic field due to the magnetization oscillation and a shift amount of the oscillation frequency caused by a magnetic field due to the uniaxial magnetic anisotropy.
摘要翻译：根据一个实施例，磁性自由层和磁性被钉扎层的磁化方向平行于磁性自由层和间隔层之间以及磁性被钉扎层和间隔层之间的结面。磁性自由层具有单轴磁各向异性，并且当大于振荡阈值电流的电流流过无磁层时，产生磁化振动。磁场发生器控制外部磁场的大小和方向，以抵消由于磁化振动引起的由抗磁场引起的振荡频率的偏移量和由于磁场引起的磁场引起的振荡频率的偏移量单轴磁各向异性。

6. 发明授权

US07816746B2 Spin-tunnel transistor and magnetic reproducing head 有权
标题翻译：旋转晶体管和磁性再现头
公开(公告)号：US07816746B2
公开(公告)日：2010-10-19
申请号：US10669007
申请日：2003-09-24
申请人： Rie Sato , Koichi Mizushima
发明人： Rie Sato , Koichi Mizushima
IPC分类号： H01L21/70 , H01F10/00
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/06 , G11B5/332 , G11B5/3919 , G11B2005/3996 , H01F10/3268 , H01L29/66984 , H01L43/08
摘要： A spin-tunnel transistor having a tunnel barrier layer formed of an antiferromagnetic material which is exchange coupled with a first or second ferromagnetic metal layer of a base B formed adjoining to the antiferromagnetic material, so as to fix magnetization of the adjoining ferromagnetic layer. The base B includes a nonmagnetic metal layer which is formed between the first and second ferromagnetic metal layers and decouple magnetization coupling between the first and second ferromagnetic metal layers. The base B is formed between a collector and an emitter to form tri-terminal device. Those spin-tunnel transistor may be used as a sensor of a magnetic reproducing head used in a hard disk drive.
摘要翻译：一种自旋隧道晶体管，其具有由反铁磁材料形成的隧道势垒层，该反铁磁材料与毗邻于铁磁材料的基底B的第一或第二铁磁性金属层交换耦合，以固定邻接的铁磁层的磁化。基体B包括形成在第一和第二强磁性金属层之间的非磁性金属层，并且使第一和第二铁磁金属层之间的磁化耦合解耦。基极B形成在集电极和发射极之间以形成三端子器件。那些自旋隧道晶体管可以用作在硬盘驱动器中使用的磁再现头的传感器。

7. 发明申请

US20090201614A1 SPIN-TORQUE OSCILLATOR, MAGNETIC HEAD INCLUDING THE SPIN-TORQUE OSCILLATOR, AND MAGNETIC RECORDING AND REPRODUCING APPARATUS 有权
标题翻译：旋转振动器，包括旋转扭矩振荡器的磁头和磁记录和再现装置
公开(公告)号：US20090201614A1
公开(公告)日：2009-08-13
申请号：US12240042
申请日：2008-09-29
申请人： Kiwamu Kudo , Tazumi Nagasawa , Koichi Mizushima , Rie Sato
发明人： Kiwamu Kudo , Tazumi Nagasawa , Koichi Mizushima , Rie Sato
IPC分类号： G11B5/33
CPC分类号： G11B5/02 , B82Y25/00 , G01R33/093 , G01R33/1284 , G11B5/3903 , G11B2005/0002 , H01F10/325 , H01F10/3254 , H01L43/08 , H03B15/006 , Y10T428/1114 , Y10T428/1121 , Y10T428/1143
摘要： It is made possible to to provide a spin-torque oscillator that has a high Q value and a high output. A spin-torque oscillator includes: an oscillating field generating unit configured to generate an oscillating field; and a magnetoresistive element including a magnetoresistive effect film including a first magnetization pinned layer of which a magnetization direction is pinned, a first magnetization free layer of which a magnetization direction oscillates with the oscillating field, and a first spacer layer interposed between the first magnetization pinned layer and the first magnetization free layer.
摘要翻译：可以提供具有高Q值和高输出的自旋扭矩振荡器。自旋转矩振荡器包括：振荡场产生单元，被配置为产生振荡场; 以及包括磁阻效应膜的磁阻元件，该磁阻效应膜包括其磁化方向被钉扎的第一磁化钉扎层，磁化方向与振荡场振动的第一磁化自由层，以及插入在第一磁化固定层和第一磁化自由层。

8. 发明申请

US20050219771A1 Magnetic sensor, magnetic field sensing method, semagnetic recording head, and magnetic memory device 有权
标题翻译：磁传感器，磁场检测方法，磁记录头，磁记忆装置
公开(公告)号：US20050219771A1
公开(公告)日：2005-10-06
申请号：US11087621
申请日：2005-03-24
申请人： Rie Sato , Koichi Mizushima
发明人： Rie Sato , Koichi Mizushima
IPC分类号： G01R33/09 , G11B5/127 , G11B5/31 , G11B5/33 , G11B20/10 , G11B20/24 , H01F10/32 , H01L43/08
CPC分类号： B82Y25/00 , G01R33/093 , G11B5/3196 , G11B20/10009 , G11B20/10046 , G11B20/24 , H01F10/3272 , H01F10/3286 , H01F10/329 , H01L43/08
摘要： A magnetic sensor includes a magnetoresistance element having a peak of a thermal fluctuation strength of magnetization under a magnetic field having a certain frequency, a frequency filter connected to the magnetoresistance element and having its transmittance decreased or increased in substantially the frequency of the magnetic field to output a signal corresponding substantially to the peak of the thermal fluctuation strength of magnetization, and a detector connected to the frequency filter to detect the magnetic field based on the signal of the frequency filter.
摘要翻译：磁传感器包括具有在具有一定频率的磁场下具有磁化强度的热波动强度的峰值的磁阻元件，连接到磁阻元件的频率滤波器，并且其透射率基本上在磁场频率下降或增加至输出基本上与磁化强度的热波动强度的峰值相对应的信号，以及连接到频率滤波器的检测器，基于频率滤波器的信号来检测磁场。

9. 发明申请

US20050024788A1 Magnetic element, magnetic information reproducing head, and magnetic information reproducing apparatus 有权
标题翻译：磁性元件，磁信息再现头和磁信息重放装置
公开(公告)号：US20050024788A1
公开(公告)日：2005-02-03
申请号：US10875273
申请日：2004-06-25
申请人： Rie Sato , Koichi Mizushima
发明人： Rie Sato , Koichi Mizushima
IPC分类号： G11B5/39 , G11B5/127 , G11B5/31 , G11B5/33 , H01F10/16 , H01F10/32 , H01L29/82
CPC分类号： G11B5/31 , G11B5/127 , G11B5/33
摘要： A magnetic element has a first magnetic material exhibiting thermal fluctuation of magnetization which depends on an external magnetic field and generates spin fluctuation in conduction electrons; a nonmagnetic conductive material which is laminated on the first magnetic material and transfers the conduction electrons; a second magnetic material which is laminated on the nonmagnetic conductive material and generates a magnetic resonance upon injection of the conduction electrons; a first electrode electrically coupled with the first magnetic material; and a second electrode electrically coupled with the second magnetic material.
摘要翻译：磁性元件具有表现出取决于外部磁场的磁化热波动的第一磁性材料，并产生传导电子的自旋波动; 非磁性导电材料，层压在第一磁性材料上并传导传导电子; 第二磁性材料层压在非磁性导电材料上并在注入导电电子时产生磁共振; 与第一磁性材料电耦合的第一电极; 以及与第二磁性材料电耦合的第二电极。

10. 发明授权

US06833598B2 Spin valve transistor 失效
标题翻译：自旋阀晶体管
公开(公告)号：US06833598B2
公开(公告)日：2004-12-21
申请号：US10320648
申请日：2002-12-17
申请人： Rie Sato , Koichi Mizushima
发明人： Rie Sato , Koichi Mizushima
IPC分类号： H01L2982
CPC分类号： H01L29/66984
摘要： There is provided a spin valve transistor that comprises a collector region made of semiconductor, a base region provided on the collector region and including a first ferromagnetic layer whose magnetization direction changes in accordance with a direction of an external magnetic field, a barrier layer provided on the base layer and made of insulator or semiconductor, and an emitter region provided on the barrier layer and including a second ferromagnetic layer whose magnetization direction is fixed.
摘要翻译：提供了一种自旋阀晶体管，其包括由半导体制成的集电极区域，设置在集电极区域上的基极区域，并且包括其磁化方向根据外部磁场的方向而变化的第一铁磁层，设置在其上的阻挡层所述基底层由绝缘体或半导体制成，以及设置在所述阻挡层上并包括其磁化方向固定的第二铁磁层的发射极区域。

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