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公开(公告)号：US20130120875A1
公开(公告)日：2013-05-16
申请号：US13678062
申请日：2012-11-15
申请人： Hirofumi SUTO , Tao Yang , Tazumi Nagasawa , Kiwamu Kudo , Rle Sato , Koichi Mizushima
发明人： Hirofumi SUTO , Tao Yang , Tazumi Nagasawa , Kiwamu Kudo , Rle Sato , Koichi Mizushima
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。
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公开(公告)号：US08861120B2
公开(公告)日：2014-10-14
申请号：US13571550
申请日：2012-08-10
申请人： Tao Yang , Hirofumi Suto , Tazumi Nagasawa , Kiwamu Kudo , Rie Sato , Koichi Mizushima
发明人： Tao Yang , Hirofumi Suto , Tazumi Nagasawa , Kiwamu Kudo , Rie Sato , Koichi Mizushima
CPC分类号： G11B5/746 , G11B5/66 , G11B5/82 , G11B2005/0024
摘要： According to one embodiment, a magnetic medium includes at least one recording layer including a first magnetic layer, a second magnetic layer and a non-magnetic layer. The first magnetic layer is form of a first magnetic material having a first magnetic anisotropy. The second magnetic layer is made of a second magnetic material having a second magnetic anisotropy different from the first magnetic anisotropy. The non-magnetic layer is made of a non-magnetic material and between the first and second magnetic layers, the first magnetic layer and the second magnetic layer being coupled such that directions of magnetization of the first and second magnetic layers are opposed to each other.
摘要翻译： 根据一个实施例，磁介质包括至少一个包括第一磁性层，第二磁性层和非磁性层的记录层。 第一磁性层是具有第一磁各向异性的第一磁性材料的形式。 第二磁性层由具有不同于第一磁各向异性的第二磁各向异性的第二磁性材料制成。 非磁性层由非磁性材料制成，并且在第一和第二磁性层之间，第一磁性层和第二磁性层被耦合，使得第一和第二磁性层的磁化方向彼此相对 。
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3.发明申请公开(公告)号：US20130107395A1
公开(公告)日：2013-05-02
申请号：US13655940
申请日：2012-10-19
申请人： Tazumi Nagasawa , Hirofumi Suto , Kiwamu Kudo , Rie Sato , Koichi Mizushima , Tao Yang
发明人： Tazumi Nagasawa , Hirofumi Suto , Kiwamu Kudo , Rie Sato , Koichi Mizushima , Tao Yang
CPC分类号： G01R33/093 , B82Y10/00 , G11B5/3909 , G11B5/3932 , G11B2005/3996 , Y10T428/11 , Y10T428/1171 , Y10T428/1193
摘要： A magnetic head according to an embodiment includes: a spin-torque oscillator comprising a first ferromagnetic layer, a second ferromagnetic layer, a third ferromagnetic layer provided on the opposite side of the second ferromagnetic layer from the first ferromagnetic layer, a first nonmagnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer, a second nonmagnetic layer provided between the second ferromagnetic layer and the third ferromagnetic layer, a first electrode provided on a surface on the opposite side of the first ferromagnetic layer from the first nonmagnetic layer, and a second electrode provided on a surface on the opposite side of the third ferromagnetic layer from the second nonmagnetic layer. Magnetization precession is induced in each of the first through third ferromagnetic layers when current is applied between the first and second electrodes.
摘要翻译： 根据实施例的磁头包括：自旋扭矩振荡器，包括第一铁磁层，第二铁磁层，设置在与第一铁磁层相反的第二铁磁层相反侧的第三铁磁层，提供第一非磁性层 在所述第一铁磁层和所述第二铁磁层之间，设置在所述第二铁磁层和所述第三铁磁层之间的第二非磁性层，设置在所述第一铁磁层与所述第一非磁性层相反侧的表面上的第一电极，以及 设置在所述第三铁磁层与所述第二非磁性层相反侧的表面上的第二电极。 当在第一和第二电极之间施加电流时，在第一至第三铁磁层中的每一个中引起磁化进动。
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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
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。
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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。
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6.发明申请公开(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。
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公开(公告)号：US20130069730A1
公开(公告)日：2013-03-21
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
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。
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8.发明授权Magnetic head with a spin torque oscillator, magnetic sensor, and magnetic recording/reproducing apparatus 有权具有自旋扭矩振荡器，磁传感器和磁记录/再现装置的磁头公开(公告)号：US08896973B2
公开(公告)日：2014-11-25
申请号：US13655940
申请日：2012-10-19
申请人： Tazumi Nagasawa , Hirofumi Suto , Kiwamu Kudo , Rie Sato , Koichi Mizushima , Tao Yang
发明人： Tazumi Nagasawa , Hirofumi Suto , Kiwamu Kudo , Rie Sato , Koichi Mizushima , Tao Yang
CPC分类号： G01R33/093 , B82Y10/00 , G11B5/3909 , G11B5/3932 , G11B2005/3996 , Y10T428/11 , Y10T428/1171 , Y10T428/1193
摘要： A magnetic head according to an embodiment includes: a spin-torque oscillator comprising a first ferromagnetic layer, a second ferromagnetic layer, a third ferromagnetic layer provided on the opposite side of the second ferromagnetic layer from the first ferromagnetic layer, a first nonmagnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer, a second nonmagnetic layer provided between the second ferromagnetic layer and the third ferromagnetic layer, a first electrode provided on a surface on the opposite side of the first ferromagnetic layer from the first nonmagnetic layer, and a second electrode provided on a surface on the opposite side of the third ferromagnetic layer from the second nonmagnetic layer. Magnetization precession is induced in each of the first through third ferromagnetic layers when current is applied between the first and second electrodes.
摘要翻译： 根据实施例的磁头包括：自旋扭矩振荡器，包括第一铁磁层，第二铁磁层，设置在与第一铁磁层相反的第二铁磁层的相对侧上的第三铁磁层，提供第一非磁性层 在所述第一铁磁层和所述第二铁磁层之间，设置在所述第二铁磁层和所述第三铁磁层之间的第二非磁性层，设置在所述第一铁磁层与所述第一非磁性层相反侧的表面上的第一电极，以及 设置在所述第三铁磁层与所述第二非磁性层相反侧的表面上的第二电极。 当在第一和第二电极之间施加电流时，在第一至第三铁磁层中的每一个中引起磁化进动。
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9.发明授权Reproducing head with spin-torque oscillator, and magnetic recording and reproducing apparatus 有权用旋转扭矩振荡器再现头，以及磁记录和再现装置公开(公告)号：US08755153B2
公开(公告)日：2014-06-17
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： G11B5/39
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。
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公开(公告)号：US20130070361A1
公开(公告)日：2013-03-21
申请号：US13571550
申请日：2012-08-10
申请人： Tao Yang , Hirofumi Suto , Tazumi Nagasawa , Kiwamu Kudo , Rie Sato , Koichi Mizushima
发明人： Tao Yang , Hirofumi Suto , Tazumi Nagasawa , Kiwamu Kudo , Rie Sato , Koichi Mizushima
CPC分类号： G11B5/746 , G11B5/66 , G11B5/82 , G11B2005/0024
摘要： According to one embodiment, a magnetic medium includes at least one recording layer including a first magnetic layer, a second magnetic layer and a non-magnetic layer. The first magnetic layer is form of a first magnetic material having a first magnetic anisotropy. The second magnetic layer is made of a second magnetic material having a second magnetic anisotropy different from the first magnetic anisotropy. The non-magnetic layer is made of a non-magnetic material and between the first and second magnetic layers, the first magnetic layer and the second magnetic layer being coupled such that directions of magnetization of the first and second magnetic layers are opposed to each other.
摘要翻译： 根据一个实施例，磁介质包括至少一个包括第一磁性层，第二磁性层和非磁性层的记录层。 第一磁性层是具有第一磁各向异性的第一磁性材料的形式。 第二磁性层由具有不同于第一磁各向异性的第二磁各向异性的第二磁性材料制成。 非磁性层由非磁性材料制成，并且在第一和第二磁性层之间，第一磁性层和第二磁性层被耦合，使得第一和第二磁性层的磁化方向彼此相对 。
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