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公开(公告)号：US08748017B2
公开(公告)日：2014-06-10
申请号：US13175358
申请日：2011-07-01
IPC分类号： G11B5/66
摘要： According to one embodiment, a bit patterned medium includes a substrate, and a magnetic recording layer disposed above the substrate and including patterns of protrusions. Each of the protrusions contains a plurality of crystal grains. An average distance between the crystal grains is 0.5 to 3.0 nm in each of the protrusions. The protrusions include first protrusions each having a length of 1 μm or more in a radial direction of the medium and second protrusions each having a length in the radial direction shorter than the length of the first protrusion in the radial direction. Each of the first protrusions has a nucleation field Hn for magnetization reversal and a coercive force Hc satisfying the inequalities, Hn≧1.5 kOe and 0.5 kOe≦Hc−Hn≦1.5 kOe.
摘要翻译： 根据一个实施例，位图案化介质包括衬底和设置在衬底上方并包括突起图案的磁记录层。 每个突起包含多个晶粒。 每个突起中晶粒之间的平均距离为0.5至3.0nm。 突起包括在介质的径向上具有1μm以上的长度的第一突起和在径向上的长度比第一突起的径向的长度短的第二突起。 每个第一突起具有用于磁化反转的成核磁场Hn和满足不等式Hn≥1.5kOe和0.5kOe＆amp; NlE; Hc-Hn＆nlE; 1.5kOe的矫顽力Hc。
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公开(公告)号：US20120019960A1
公开(公告)日：2012-01-26
申请号：US13175358
申请日：2011-07-01
摘要： According to one embodiment, a bit patterned medium includes a substrate, and a magnetic recording layer disposed above the substrate and including patterns of protrusions. Each of the protrusions contains a plurality of crystal grains. An average distance between the crystal grains is 0.5 to 3.0 nm in each of the protrusions. The protrusions include first protrusions each having a length of 1 μm or more in a radial direction of the medium and second protrusions each having a length in the radial direction shorter than the length of the first protrusion in the radial direction. Each of the first protrusions has a nucleation field Hn for magnetization reversal and a coercive force Hc satisfying the inequalities, Hn≧1.5 kOe and 0.5 kOe≦Hc−Hn≦1.5 kOe.
摘要翻译： 根据一个实施例，位图案化介质包括衬底和设置在衬底上方并包括突起图案的磁记录层。 每个突起包含多个晶粒。 每个突起中晶粒之间的平均距离为0.5至3.0nm。 突起包括在介质的径向上具有1μm以上的长度的第一突起和在径向上的长度比第一突起的径向的长度短的第二突起。 每个第一突起具有用于磁化反转的成核磁场Hn和满足不等式Hn≥1.5kOe和0.5kOe＆amp; NlE; Hc-Hn＆nlE; 1.5kOe的矫顽力Hc。
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公开(公告)号：US08488373B2
公开(公告)日：2013-07-16
申请号：US13200844
申请日：2011-10-03
申请人： Kunliang Zhang , Min Li , Yuchen Zhou , Soichi Oikawa , Hitoshi Iwasaki , Kenichiro Yamada , Katsuhiko Koui
发明人： Kunliang Zhang , Min Li , Yuchen Zhou , Soichi Oikawa , Hitoshi Iwasaki , Kenichiro Yamada , Katsuhiko Koui
IPC分类号： G11C11/00
CPC分类号： H03B15/006 , C23C14/025 , C23C14/165 , G11C5/005 , G11C11/161 , Y10T428/1114
摘要： A spin transfer (torque) oscillator (STO) with a non-magnetic spacer formed between a spin injection layer (SIL) and a field generation layer (FGL), and with an interfacial layer comprised of Fe(100-V)CoV where v is from 5 to 100 atomic % formed between the SIL and non-magnetic spacer is disclosed. A composite seed layer made of Ta and a metal layer having a fcc(111) or hcp(001) texture is used to enhance perpendicular magnetic anisotropy (PMA) in the STO device. The interfacial layer quenches SIL oscillations and thereby stabilizes the SIL against FGL oscillations. The interfacial layer preferably has a thickness from 5 to 50 Angstroms and enhances amplitude (dR/R) in the STO device. The STO device may have a top SIL or bottom SIL configuration. The SIL is typically a laminated structure such as (Co/Ni)X where x is between 5 and 50.
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4.发明授权Spin oscillator or magnetic recorder including multiple injection layers in the magnetic recording head 有权旋转振荡器或磁记录器，包括磁记录头中的多个注入层公开(公告)号：US08472140B2
公开(公告)日：2013-06-25
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。
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公开(公告)号：US07901801B2
公开(公告)日：2011-03-08
申请号：US12166592
申请日：2008-07-02
申请人： Soichi Oikawa , Tomoyuki Maeda
发明人： Soichi Oikawa , Tomoyuki Maeda
IPC分类号： G11B5/66
CPC分类号： G11B5/732 , G11B5/66 , G11B5/667 , Y10T428/115
摘要： According to one embodiment, a perpendicular magnetic recording medium includes a substrate, and a first magnetic layer and a second magnetic layer formed on the substrate, in which supposing that, for the first and second magnetic layers, respectively, uniaxial magnetic anisotropy constants are Ku1 and Ku2, saturation magnetizations are Ms1 and Ms2, anisotropic magnetic fields are Hk1 and Hk2 and the thicknesses are t1 and t2, then following conditions are satisfied that Ku1 and Ku2 are 3×106 erg/cc or more, Ms1 is smaller than Ms2, Hk1 is larger than Hk2 and t1 is larger than t2.
摘要翻译： 根据一个实施例，垂直磁记录介质包括基板，以及形成在基板上的第一磁性层和第二磁性层，其中，对于第一和第二磁性层，单轴磁各向异性常数分别为Ku1 Ku2，饱和磁化为Ms1和Ms2，各向异性磁场为Hk1和Hk2，厚度为t1和t2，则满足Ku1和Ku2为3×106erg / cc或更高的条件，Ms1小于Ms2， Hk1大于Hk2，t1大于t2。
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公开(公告)号：US20100007992A1
公开(公告)日：2010-01-14
申请号：US12453855
申请日：2009-05-26
申请人： Kenichiro Yamada , Hitoshi Iwasaki , Masayuki Takagishi , Tomomi Funayama , Masahiro Takashita , Mariko Shimizu , Soichi Oikawa , Katsuhiko Koui
发明人： Kenichiro Yamada , Hitoshi Iwasaki , Masayuki Takagishi , Tomomi Funayama , Masahiro Takashita , Mariko Shimizu , Soichi Oikawa , Katsuhiko Koui
IPC分类号： G11B5/48
CPC分类号： G11B5/314 , G11B5/02 , G11B5/1278 , G11B5/3146 , G11B2005/0005 , G11B2005/0024
摘要： A magnetic head assembly includes a magnetic recording head, a head slider, a suspension and an actuator arm. The magnetic recording head includes: a main magnetic pole; an adjustment magnetic pole provided together with the main magnetic pole; a spin torque oscillator; a main magnetic pole coil being wound around the main magnetic pole; and an adjustment magnetic pole coil being wound around the adjustment magnetic pole. At least part of the spin torque oscillator is provided between the main magnetic pole and the adjustment magnetic pole. A way of winding of the adjustment magnetic pole coil is different from a way of winding of the main magnetic pole coil. The magnetic recording head is mounted on the head slider. The head slider is mounted on one end of the suspension. The actuator arm is connected to the other end of the suspension.
摘要翻译： 磁头组件包括磁记录头，磁头滑块，悬架和致动臂。 磁记录头包括：主磁极; 与主磁极一起设置的调节磁极; 自旋转矩振荡器; 主磁极线圈缠绕在主磁极上; 并且调节磁极线圈缠绕在调节磁极上。 旋转扭矩振荡器的至少一部分设置在主磁极和调节磁极之间。 调整用磁极线圈的卷绕方式与主磁极线圈的卷绕方式不同。 磁记录头安装在磁头滑块上。 磁头滑块安装在悬架的一端。 执行器臂连接到悬架的另一端。
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7.发明申请Thin seeded Co/Ni multilayer film with perpendicular anisotropy for spintronic device applications 有权用于自旋电子器件应用的具有垂直各向异性的薄晶种Co / Ni多层膜公开(公告)号：US20090257151A1
公开(公告)日：2009-10-15
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
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。
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8.发明申请公开(公告)号：US20090141399A1
公开(公告)日：2009-06-04
申请号：US12274879
申请日：2008-11-20
申请人： Akira SAKAWAKI , Kenji Shimizu , Kazuo Kobayashi , Hiroshi Sakai , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Futoshi Nakamura
发明人： Akira SAKAWAKI , Kenji Shimizu , Kazuo Kobayashi , Hiroshi Sakai , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Futoshi Nakamura
摘要： A magnetic-recording medium which is provided on a nonmagnetic substrate with at least an orientation-controlling layer for controlling the orientation of a layer formed directly thereon, a perpendicularly magnetic layer having an easily magnetizing axis oriented mainly perpendicularly relative to the nonmagnetic substrate, and a protective layer. The perpendicularly magnetic layer includes two or more magnetic layers, at least one of the magnetic layers is a layer having Co as a main component and containing Pt as well and containing an oxide, and at least another of the magnetic layers is a layer having Co as a main component and containing Cr as well and containing no oxide.
摘要翻译： 一种磁记录介质，其设置在至少具有用于控制直接形成的层的取向的取向控制层的非磁性基板上，具有相对于非磁性基板主要垂直取向的易磁化轴的垂直磁性层，以及 保护层。 垂直磁性层包括两个或更多个磁性层，至少一个磁性层是具有Co作为主要成分并且还含有Pt并含有氧化物的层，并且至少另一个磁性层是具有Co 作为主要成分，并含有Cr，也不含氧化物。
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9.发明授权公开(公告)号：US07166376B2
公开(公告)日：2007-01-23
申请号：US10786611
申请日：2004-02-26
申请人： Takashi Hikosaka , Futoshi Nakamura , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Takashi Hikosaka , Futoshi Nakamura , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B5/66
摘要： A multi-layer including a magnetic recording layer and a high-magnetostriction layer having a magnetostriction constant larger than that of the magnetic recording layer is formed.
摘要翻译： 形成包括磁记录层和磁致伸缩常数大于磁记录层的磁致伸缩常数的高磁致伸缩层的多层。
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10.发明授权公开(公告)号：US07138194B2
公开(公告)日：2006-11-21
申请号：US10630796
申请日：2003-07-31
CPC分类号： G11B5/667 , G11B5/7325
摘要： The magnetic recording medium comprises a soft magnetic undercoat film, an orientation control film that controls the orientation of a film provided directly above, a perpendicular magnetic film of which axis of easy magnetization is generally oriented perpendicular to a non-magnetic substrate, and a protective film, that are provided on the non-magnetic substrate, wherein the orientation control film is made of a Co alloy which contains one or more elements selected from Ti, V, Sr, Y, Nb, Mo, Hf, Ta, Ni and W.
摘要翻译： 磁记录介质包括软磁性底涂膜，控制直接在其上方设置的膜的取向的取向控制膜，容易磁化的轴线大致垂直于非磁性基板的垂直磁性膜，以及保护膜 膜，其中所述取向控制膜由包含选自Ti，V，Sr，Y，Nb，Mo，Hf，Ta，Ni和W中的一种或多种元素的Co合金制成 。
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