发明名称 Magnetic recording medium, method of manufacture therefor, and magnetic read/write apparatus
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.
申请公布号 US6723458(B2) 申请公布日期 2004.04.20
申请号 US20020218570 申请日期 2002.08.15
申请人 SHOWA DENKO K.K.;TOSHIBA CORPORATION 发明人 SHIMIZU KENJI;SAKAWAKI AKIRA;YANG HUI;MOCHIZUKI HIRO;SAKAI HIROSHI;HIKOSAKA TAKASHI;NAKAMURA FUTOSHI
分类号 G11B5/64;G11B5/73;(IPC1-7):G11B5/66;G11B5/70 主分类号 G11B5/64
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