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    MAGNETIC RECORDING MEDIUM, METHOD FOR MANUFACTURING RECORDING MEDIUM AND MAGNETIC RECORDATION APPARATUS
    1.
    发明申请
    MAGNETIC RECORDING MEDIUM, METHOD FOR MANUFACTURING RECORDING MEDIUM AND MAGNETIC RECORDATION APPARATUS 审中-公开
    磁记录介质，制造记录介质和磁记录装置的方法

    公开(公告)号：US20080260942A1

    公开(公告)日：2008-10-23

    申请号：US11875148

    申请日：2007-10-19

    申请人： Tomoyuki MAEDA ,  Akira KIKITSU ,  Soichi OIKAWA ,  Takeshi IWASAKI

    发明人： Tomoyuki MAEDA ,  Akira KIKITSU ,  Soichi OIKAWA ,  Takeshi IWASAKI

    IPC分类号： B05D5/12

    CPC分类号： G11B5/667 ,  G11B5/65 ,  G11B5/7325

    摘要： A grain diameter controlling crystalline layer comprising crystalline grains of a metal selected from the group consisting essentially of Cu, Ni, Rh and Pt was formed on a substrate. Then, deposited atom layer of at least one element selected from the group consisting of oxygen and carbon was formed on the surface of the grain diameter control layer. A magnetic recording layer was deposited on the atoms deposited grain diameter controlling crystalline layer. Then a magnetic recording medium in which the magnetic crystalline grains has small grain diameter and small grain diameter distribution, and the magnetic recording medium shows increased signal to noise ratio at high recording density.

    摘要翻译： 在基板上形成包含选自Cu，Ni，Rh和Pt中的金属的晶粒的晶粒直径控制晶体层。 然后，在粒径控制层的表面上形成从由氧和碳组成的组中选择的至少一种元素的沉积原子层。 在原子沉积粒径控制晶体层上沉积磁记录层。 然后是其中磁晶粒具有小的粒径和小的粒径分布的磁记录介质，并且磁记录介质在高记录密度下显示增加的信噪比。

    THERMALLY ASSISTED MAGNETIC RECORDING MEDIUM AND THERMALLY ASSISTED MAGNETIC RECORDING APPARATUS
    2.
    发明申请
    THERMALLY ASSISTED MAGNETIC RECORDING MEDIUM AND THERMALLY ASSISTED MAGNETIC RECORDING APPARATUS 有权
    热辅助磁记录介质和热辅助磁记录仪

    公开(公告)号：US20130250449A1

    公开(公告)日：2013-09-26

    申请号：US13597042

    申请日：2012-08-28

    申请人： Soichi OIKAWA

    发明人： Soichi OIKAWA

    IPC分类号： G11B5/02

    CPC分类号： G11B5/1278 ,  G11B2005/0021

    摘要： According to one embodiment, a thermally assisted magnetic recording method performs heating at a temperature higher than the ambient temperature of the perpendicular recording medium and lower than a temperature at which a nucleation magnetic field Hn of the recording portion is 0, decreases a coercive force Hc of a recording portion by heating a perpendicular recording medium, and records magnetic information by applying a recording magnetic field from a recording magnetic pole to the recording portion having the decreased coercive force.

    摘要翻译： 根据一个实施例，热辅助磁记录方法在高于垂直记录介质的环境温度的温度下进行加热，并且低于记录部分的成核磁场Hn为0的温度，降低矫顽力Hc 通过加热垂直记录介质来记录记录部分，并通过将记录磁场从记录磁极施加到具有降低的矫顽力的记录部分来记录磁信息。

    MAGNETIC RECORDING MEDIUM
    6.
    发明申请
    MAGNETIC RECORDING MEDIUM 有权
    磁记录介质

    公开(公告)号：US20120263975A1

    公开(公告)日：2012-10-18

    申请号：US13303479

    申请日：2011-11-23

    申请人： Soichi OIKAWA

    发明人： Soichi OIKAWA

    IPC分类号： G11B5/706

    CPC分类号： G11B5/65 ,  G11B5/66 ,  G11B5/7325

    摘要： According to one embodiment, a perpendicular magnetic recording medium includes a substrate, and a multilayered magnetic recording layer formed on the substrate by alternately stacking two or more magnetic layers and two or more nonmagnetic layers. The magnetic layers and nonmagnetic layers of the multilayered magnetic recording layer are continuous layers. The magnetic layer includes a magnetic material portion, and a plurality of pinning sites dispersed in the magnetic material portion and made of a nonmagnetic metal different from a nonmagnetic material as a main component of the nonmagnetic layer. This perpendicular magnetic recording medium has magnetic characteristics by which a gradient a of a magnetization curve near the coercive force is 5 or more.

    摘要翻译： 根据一个实施例，垂直磁记录介质包括通过交替堆叠两个或更多个磁性层和两个或更多个非磁性层而形成在衬底上的衬底和多层磁记录层。 多层磁记录层的磁性层和非磁性层是连续层。 磁性层包括磁性材料部分和分散在磁性材料部分中并由不同于非磁性材料的非磁性材料制成的多个钉扎部位作为非磁性层的主要成分。 该垂直磁记录介质具有磁矫顽力附近的磁化曲线的梯度a为5以上的磁特性。

    MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS
    8.
    发明申请
    MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS 审中-公开
    磁记录头和磁记录装置

    公开(公告)号：US20120002331A1

    公开(公告)日：2012-01-05

    申请号：US13171206

    申请日：2011-06-28

    申请人： Soichi OIKAWA ,  Kenichiro YAMADA ,  Katsuhiko KOUI ,  Masayuki TAKAGISHI

    发明人： Soichi OIKAWA ,  Kenichiro YAMADA ,  Katsuhiko KOUI ,  Masayuki TAKAGISHI

    IPC分类号： G11B5/33

    CPC分类号： G11B5/3133 ,  G11B5/1278 ,  G11B2005/001

    摘要： According to one embodiment, there is provided a magnetic recording head including a main pole, and a spin torque oscillator provided adjacent to the main pole and includes an oscillation layer including a first magnetic layer and a second magnetic layer and a third magnetic layer provided closer to the second magnetic layer and configured to inject a spin into the oscillation layer. The first magnetic layer has a saturation flux density of 1 T or more and 1.9 T or less.

    摘要翻译： 根据一个实施例，提供了一种包括主极的磁记录头和与主极相邻设置的自旋扭矩振荡器，并且包括具有第一磁性层和第二磁性层的振荡层和靠近 到第二磁性层，并且被配置为向振荡层注入自旋。 第一磁性层的饱和磁通密度为1T以上且1.9T以下。

    MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS
    9.
    发明申请
    MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING APPARATUS 有权
    磁记录头和磁记录装置

    公开(公告)号：US20120002325A1

    公开(公告)日：2012-01-05

    申请号：US13171418

    申请日：2011-06-28

    申请人： Soichi OIKAWA ,  Katsuhiko Koui

    发明人： Soichi OIKAWA ,  Katsuhiko Koui

    IPC分类号： G11B5/127 ,  G11B5/187

    CPC分类号： G11B5/3146 ,  G11B5/1278 ,  G11B2005/0005 ,  G11B2005/0024

    摘要： According to one embodiment, a magnetic recording head includes a main magnetic pole generating a recording magnetic field in a magnetic recording medium, a return yoke paired with the main magnetic pole, and a spin torque oscillator interposed between the main magnetic pole and the return yoke and including a spin injection layer, an oscillation layer, a nonmagnetic metal layer, and spin assist layer stacked in this order, wherein the nonmagnetic metal layer includes at least one metal selected from the group consisting of Cu, Au, Ag, Al, Pd, Pt, Os, and Ir, and the spin assist layer is a soft magnetic layer whose saturation magnetic flux density (Bs), diamagnetic field coefficient (N) and gap magnetic field (Hg) show a relationship expressed by Bs×N>Hg.

    摘要翻译： 根据一个实施例，磁记录头包括在磁记录介质中产生记录磁场的主磁极，与主磁极配对的返回磁轭和插在主磁极和返回磁轭之间的自旋扭矩振荡器 并且包括依次层叠的自旋注入层，振荡层，非磁性金属层和自旋辅助层，其中，所述非磁性金属层包含选自Cu，Au，Ag，Al，Pd ，Pt，Os和Ir，自旋辅助层是其饱和磁通密度（Bs），抗磁场系数（N）和间隙磁场（Hg）表现出由Bs×N> Hg表示的关系的软磁性层 。