公开(公告)号：US08467149B2

公开(公告)日：2013-06-18

申请号：US13218297

申请日：2011-08-25

申请人： Akihiko Takeo ,  Norihito Fujita ,  Mariko Kitazaki ,  Katsuhiko Koui ,  Hitoshi Iwasaki

发明人： Akihiko Takeo ,  Norihito Fujita ,  Mariko Kitazaki ,  Katsuhiko Koui ,  Hitoshi Iwasaki

IPC分类号： G11B5/31

CPC分类号： G11B5/3146 ,  G11B5/314 ,  G11B2005/0024 ,  Y10T428/1171

摘要： According to one embodiment, a spin torque oscillator includes a field generation layer, a spin injection layer including a first layer and a second layer, and an interlayer interposed between the field generation layer and the spin injection layer, wherein the first layer is interposed between the second layer and the interlayer and includes a (001)-oriented Heuslar magnetic alloy or a (001)-oriented magnetic material having a body-centered cubic lattice structure.

摘要翻译： 根据一个实施例，自旋扭矩振荡器包括场产生层，包括第一层和第二层的自旋注入层以及介于场产生层和自旋注入层之间的夹层，其中第一层介于 第二层和中间层，并且包括具有体心立方晶格结构的（001）取向的Heuslar磁性合金或（001）取向的磁性材料。

公开(公告)号：US20120262821A1

公开(公告)日：2012-10-18

申请号：US13296004

申请日：2011-11-14

申请人： Tomoko Taguchi ,  Masayuki Takagishi ,  Katsuhiko Koui ,  Kenichiro Yamada ,  Hitoshi Iwasaki

发明人： Tomoko Taguchi ,  Masayuki Takagishi ,  Katsuhiko Koui ,  Kenichiro Yamada ,  Hitoshi Iwasaki

IPC分类号： G11B5/23 ,  G11B17/02 ,  G11B5/48

CPC分类号： G11B5/314 ,  G11B5/235 ,  G11B2005/0024

摘要： According to one embodiment, a magnetic recording head includes a main pole configured to apply a recording magnetic field perpendicular to a recording medium, a trailing-shield pole opposed to the main pole with a recording gap therebetween, a high-frequency oscillator between the main pole and the trailing-shield pole in the recording gap, configured to produce a high-frequency magnetic field, a magnetic seed layer between the main pole and the high-frequency oscillator and in contact with the main pole, and a highly oriented magnetic layer of a soft magnetic material superposed on the magnetic seed layer between the main pole and the high-frequency oscillator and in contact with the high-frequency oscillator.

摘要翻译： 根据一个实施例，磁记录头包括被配置为施加垂直于记录介质的记录磁场的主极，与主极相对的后屏蔽极，其间具有记录间隙，在主体之间的高频振荡器 磁极和后屏蔽极在记录间隙中，被配置为产生高频磁场，主极和高频振荡器之间的磁性种子​​层，并与主极接触，并且高取向磁性层 叠置在主极与高频振荡器之间的磁性种子​​层上并与高频振荡器接触的软磁性材料。

公开(公告)号：US20120262820A1

公开(公告)日：2012-10-18

申请号：US13295866

申请日：2011-11-14

申请人： Takuya MATSUMOTO ,  Kenichiro YAMADA ,  Masayuki TAKAGISHI ,  Katsuhiko KOUI ,  Hitoshi IWASAKI

发明人： Takuya MATSUMOTO ,  Kenichiro YAMADA ,  Masayuki TAKAGISHI ,  Katsuhiko KOUI ,  Hitoshi IWASAKI

IPC分类号： G11B5/147 ,  G11B17/04 ,  G11B5/60

CPC分类号： G11B5/1278 ,  G11B5/3133

摘要： According to one embodiment, a magnetic head includes a main pole configured to apply a recording magnetic field to a recording layer of a recording medium, a return pole opposed to the main pole with a write gap therebetween, and a high-frequency oscillator between respective facing surfaces of the main pole and the return pole and configured to produce a high-frequency magnetic field. At least one of the main and return poles faces the high-frequency oscillator and includes a laminated structure portion includes a magnetic layer and a nonmagnetic layer laminated to one another.

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记录磁场;与主极相对的返回极与它们之间具有写入间隔;以及高频振荡器， 主极和返回极的面对表面，并被配置为产生高频磁场。 主极和返极两者中的至少一个面向高频振荡器，并且包括层叠结构部分，其包括彼此层叠的磁性层和非磁性层。

公开(公告)号：US20120154952A1

公开(公告)日：2012-06-21

申请号：US13404046

申请日：2012-02-24

申请人： Kenichiro YAMADA ,  Hitoshi IWASAKI ,  Masayuki TAKAGISHI ,  Tomomi FUNAYAMA ,  Masahiro TAKASHITA ,  Katsuhiko KOUI ,  Mariko KITAZAKI ,  Soichi OIKAWA

发明人： Kenichiro YAMADA ,  Hitoshi IWASAKI ,  Masayuki TAKAGISHI ,  Tomomi FUNAYAMA ,  Masahiro TAKASHITA ,  Katsuhiko KOUI ,  Mariko KITAZAKI ,  Soichi OIKAWA

IPC分类号： G11B5/147

CPC分类号： G11B5/3146 ,  B82Y25/00 ,  G11B5/02 ,  G11B5/3133 ,  H01F10/3254 ,  H01F10/3286 ,  H01L43/08

摘要： A magnetic recorder includes: a magnetic recording medium; a reproducing head; a magnetic recording head including: a main magnetic pole; a first magnetic layer containing a TM alloy; a second magnetic layer containing a TM alloy or an RE-TM alloy; a third magnetic layer containing an RE-TM alloy; a first intermediate layer provided between the first magnetic layer and the second magnetic layer; and a second intermediate layer provided between the second magnetic layer and the third magnetic layer; and a signal processing portion which performs signal writing into the magnetic recording medium by using the magnetic recording head and reading from the magnetic recording medium by using the reproducing head.

摘要翻译： 磁记录器包括：磁记录介质; 再现头 磁记录头，包括：主磁极; 含有TM合金的第一磁性层; 含有TM合金或RE-TM合金的第二磁性层; 含有RE-TM合金的第三磁性层; 设置在所述第一磁性层和所述第二磁性层之间的第一中间层; 以及设置在所述第二磁性层和所述第三磁性层之间的第二中间层; 以及信号处理部分，其通过使用磁记录头并通过使用再现头从磁记录介质读取来执行信号写入磁记录介质。

公开(公告)号：US08169741B2

公开(公告)日：2012-05-01

申请号：US11797447

申请日：2007-05-03

申请人： Tomoko Taguchi ,  Tomomi Funayama ,  Yuka Aoyagi ,  Katsuhiko Koui

发明人： Tomoko Taguchi ,  Tomomi Funayama ,  Yuka Aoyagi ,  Katsuhiko Koui

IPC分类号： G11B5/127

CPC分类号： G11B5/3143 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315

摘要： According to one embodiment, a perpendicular magnetic recording head includes a main pole which generates a recording magnetic field, a return pole which forms a closed magnetic circuit for the recording magnetic field, and a side shield magnetically spaced from the main pole in a cross-track direction in which a point on a trailing edge of the side shield which is closest to the main pole is positioned on a leading side of a trailing edge of the main pole.

摘要翻译： 根据一个实施例，垂直磁记录头包括产生记录磁场的主极，形成用于记录磁场的闭合磁路的返回极，以及在横截面中与主极磁隔离的侧屏蔽， 轨道方向，其中最靠近主极的侧护板的后缘上的点位于主杆的后缘的前侧。

公开(公告)号：US08064244B2

公开(公告)日：2011-11-22

申请号：US12456621

申请日：2009-06-19

申请人： Kunliang Zhang ,  Min Li ,  Yuchen Zhou ,  Soichi Oikawa ,  Kenichiro Yamada ,  Katsuhiko Koui

发明人： Kunliang Zhang ,  Min Li ,  Yuchen Zhou ,  Soichi Oikawa ,  Kenichiro Yamada ,  Katsuhiko Koui

IPC分类号： G11C11/00

CPC分类号： G01R33/098 ,  G01R33/1284 ,  G11C11/161 ,  H01L43/08 ,  H01L43/10 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052 ,  Y10T428/1107 ,  Y10T428/1114 ,  Y10T428/1121 ,  Y10T428/1129 ,  Y10T428/1136 ,  Y10T428/1143

摘要： A spin valve structure for a spintronic device is disclosed and includes a composite seed layer made of at least Ta and a metal layer having a fcc(111) or hcp(001) texture to enhance perpendicular magnetic anisotropy (PMA) in an overlying (Co/Ni)x multilayer. The (Co/Ni)x multilayer is deposited by a low power and high Ar pressure process to avoid damaging Co/Ni interfaces and thereby preserving PMA. As a result, only a thin seed layer is required. PMA is maintained even after annealing at 220° C. for 10 hours. Examples of GMR and TMR spin valves are described and may be incorporated in spin transfer oscillators and spin transfer MRAMs. The free layer is preferably made of a FeCo alloy including at least one of Al, Ge, Si, Ga, B, C, Se, Sn, or a Heusler alloy, or a half Heusler alloy to provide high spin polarization and a low magnetic damping coefficient.

摘要翻译： 公开了一种用于自旋电子器件的自旋阀结构，并且包括至少由Ta制成的复合种子层和具有fcc（111）或hcp（001）织构的金属层，以增强覆盖层（Co）中的垂直磁各向异性（PMA） / Ni）x多层。 （Co / Ni）x多层通过低功率和高Ar压力工艺沉积，以避免损坏Co / Ni界面，从而保留PMA。 结果，仅需要薄的种子层。 即使在220℃退火10小时后也保持PMA。 描述了GMR和TMR自旋阀的实例，并且可以结合在自旋转移振荡器和自旋转移MRAM中。 自由层优选由包括Al，Ge，Si，Ga，B，C，Se，Sn或Heusler合金或Heusler合金中的至少一种的FeCo合金制成，以提供高自旋极化和低磁性 阻尼系数。

公开(公告)号：US20110242701A1

公开(公告)日：2011-10-06

申请号：US13016687

申请日：2011-01-28

申请人： Masaya Ohtake ,  Tomoko Taguchi ,  Masayuki Takagishi ,  Kenichiro Yamada ,  Katsuhiko Koui

发明人： Masaya Ohtake ,  Tomoko Taguchi ,  Masayuki Takagishi ,  Kenichiro Yamada ,  Katsuhiko Koui

IPC分类号： G11B5/23 ,  G11B17/02

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。

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。

公开(公告)号：US20110205667A1

公开(公告)日：2011-08-25

申请号：US12853690

申请日：2010-08-10

申请人： Kenichiro YAMADA ,  Katsuhiko KOUI ,  Mariko KITAZAKI ,  Masayuki TAKAGISHI ,  Tomomi FUNAYAMA ,  Masahiro TAKASHITA ,  Soichi OIKAWA ,  Akihiko TAKEO

发明人： Kenichiro YAMADA ,  Katsuhiko KOUI ,  Mariko KITAZAKI ,  Masayuki TAKAGISHI ,  Tomomi FUNAYAMA ,  Masahiro TAKASHITA ,  Soichi OIKAWA ,  Akihiko TAKEO

IPC分类号： G11B5/187

CPC分类号： G11B5/3116 ,  B82Y10/00 ,  G11B5/11 ,  G11B5/315 ,  G11B5/743

摘要： A magnetic recording head includes a magnetic pole, a spin torque oscillator, a first shield and a second shield. The magnetic pole has an air-bearing surface. The spin torque oscillator is provided so that a first side of the spin torque oscillator faces the magnetic pole in a first direction parallel to the air-bearing surface. The first shield includes a granular magnetic material, and is provided so that two portions of the first shield sandwich the spin torque oscillator in a second direction which is parallel to the air-bearing surface and perpendicular to the first direction. The second shield is provided on a second side of the spin torque oscillator opposite to the first side.

摘要翻译： 磁记录头包括磁极，自旋转矩振荡器，第一屏蔽和第二屏蔽。 磁极具有空气轴承表面。 旋转扭矩振荡器被设置成使得旋转扭矩振荡器的第一侧在平行于空气轴承表面的第一方向上面对磁极。 第一屏蔽包括颗粒状磁性材料，并且被设置成使得第一屏蔽的两个部分在平行于空气轴承表面并垂直于第一方向的第二方向上夹住旋转扭矩振荡器。 第二屏蔽设置在与第一侧相反的自旋扭矩振荡器的第二侧上。

公开(公告)号：US20100142088A1

公开(公告)日：2010-06-10

申请号：US12588176

申请日：2009-10-06

申请人： Hitoshi Iwasaki ,  Soichi Oikawa ,  Katsuhiko Koui ,  Kenichiro Yamada

发明人： Hitoshi Iwasaki ,  Soichi Oikawa ,  Katsuhiko Koui ,  Kenichiro Yamada

IPC分类号： G11B5/127

CPC分类号： G11B5/3146 ,  G11B5/314 ,  G11B2005/0005 ,  G11B2005/0024 ,  G11C11/161 ,  G11C11/1673 ,  G11C11/1675 ,  H01L43/08 ,  H03B15/006

摘要： A spin torque oscillator includes an amorphous soft magnetic layer, a nonmagnetic layer and a hard magnetic layer. The nonmagnetic layer with a close-packed crystal structure is provided on the amorphous soft magnetic layer. The hard magnetic layer with a close-packed crystal structure and perpendicular magnetic anisotropy is provided on the nonmagnetic layer.

摘要翻译： 自旋转矩振荡器包括非晶软磁层，非磁性层和硬磁层。 在非晶软磁层上提供具有紧密结晶结构的非磁性层。 在非磁性层上提供具有紧密堆积晶体结构和垂直磁各向异性的硬磁性层。