公开(公告)号：US20030059651A1

公开(公告)日：2003-03-27

申请号：US10242446

申请日：2002-09-13

Applicant: SHOWA DENKO K.K. and TOSHIBA CORPORATION

Inventor： Kenji Shimizu ,  Akira Sakawaki ,  Hui Yang ,  Hiro Mochizuki ,  Hiroshi Sakai ,  Takashi Hikosaka ,  Soichi Oikawa

IPC: G11B005/66

CPC classification number: G11B5/667 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7325 ,  Y10T428/12465 ,  Y10T428/12861 ,  Y10T428/12931 ,  Y10T428/12944 ,  Y10T428/265

Abstract: A magnetic recording medium having excellent magnetic read/write characteristics and thermal stability characteristics, and a method of manufacturing therefor, and a magnetic read/write apparatus are provided. This magnetic recording medium comprises an orientation control film 3 that controls the orientation of a film provided directly thereabove, a perpendicular magnetic film 5, of which the axis of easy magnetization is generally oriented perpendicular to a substrate, and a protective film 6, that are provided on a non-magnetic substrate 1, wherein the orientation control film 3 is made of a non-magnetic material which contains 33 to 80 at % of Ni and one or more kinds of elements selected from Sc, Y, Ti, Zr, Hf, Nb and Ta.

Abstract translation: 提供具有优异的磁读/写特性和热稳定性特性的磁记录介质及其制造方法和磁读/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3，容易磁化轴线垂直于基板的垂直磁性膜5和保护膜6， 设置在非磁性基板1上，其中取向控制膜3由非磁性材料制成，该非磁性材料包含33至80原子％的Ni和选自Sc，Y，Ti，Zr，Hf中的一种或多种元素 ，Nb和Ta。

公开(公告)号：US20030104250A1

公开(公告)日：2003-06-05

申请号：US10218570

申请日：2002-08-15

Applicant: SHOWA DENKO K.K. and TOSHIBA CORPORATION

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

IPC: G11B005/66

CPC classification number: G11B5/667 ,  G11B5/656 ,  G11B5/7325 ,  Y10S428/90

Abstract: 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 (nullHn) being 0 (Oe) to 2500 (Oe), and a ratio of residual magnetization (Mr) to saturation magnetization (Ms) being at least 0.85.

Abstract translation: 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。