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    Magnetic recording medium, method of manufacture therefor, and magnetic read/write apparatus
    3.
    发明授权
    Magnetic recording medium, method of manufacture therefor, and magnetic read/write apparatus 失效
    磁记录介质，其制造方法和磁读/写装置

    公开(公告)号：US06723458B2

    公开(公告)日：2004-04-20

    申请号：US10218570

    申请日：2002-08-15

    申请人： Kenji Shimizu ,  Akira Sakawaki ,  Hui Yang ,  Hiro Mochizuki ,  Hiroshi Sakai ,  Takashi Hikosaka ,  Futoshi Nakamura

    发明人： Kenji Shimizu ,  Akira Sakawaki ,  Hui Yang ,  Hiro Mochizuki ,  Hiroshi Sakai ,  Takashi Hikosaka ,  Futoshi Nakamura

    IPC分类号： G11B566

    CPC分类号： G11B5/667 ,  G11B5/656 ,  G11B5/7325 ,  Y10S428/90

    摘要： A magnetic recording medium that is capable of recording and reading back information at a higher density by improving the read/write characteristics and thermal stability, a method of manufacture therefor, and a magnetic read/write apparatus are provided. This magnetic recording medium, comprises an orientation control film that controls the orientation of a film provided directly thereabove, a perpendicular magnetic film, of which the 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 perpendicular magnetic film is made of a material which contains Co, Cr, Pt and Cu, the Cr content being 16 at % to 24 at % and the Cu content being 0.1 at % to 4 at %, and a coercive force (Hc) of the perpendicular magnetic film being at least 3000 (Oe), negative nucleation field (−Hn) being 0 (Oe) to 2500 (Oe), and a ratio of residual magnetization (Mr) to saturation magnetization (Ms) being at least 0.85.

    摘要翻译： 提供能够通过改善读/写特性和热稳定性而以更高密度记录和读回信息的磁记录介质，其制造方法和磁读/写装置。 这种磁记录介质包括控制直接在其上设置的膜的取向的取向控制膜，容易磁化轴垂直于非磁性基板的垂直磁性膜和保护膜，其中 设置在非磁性基板上，其中垂直磁性膜由含有Co，Cr，Pt和Cu的材料制成，Cr含量为16at％至24at％，Cu含量为0.1at％至4 （Oe），负成核场（-Hn）为0（Oe）〜2500（Oe），剩余磁化强度（Mr））为0以上，垂直磁性膜的矫顽力（Hc）为3000 饱和磁化强度（Ms）至少为0.85。