发明名称 |
PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD OF PRODUCING SAME |
摘要 |
<p>A perpendicular magnetic recordng medium is fabricated based on R21-60(Fe1-yCoy)zM0-10 wherein z is balance and at least 70 at % of R is Nd and/or Pr, the balance of R being one or more of other rare earth elements, and wherein y is less than 0.5 by atomic ratio. M is at least one of various additional metal elements. The Curie temperature Tc is between 70 to 250 DEG C; the saturation magnetization Ms is about 450 emu/cc or more; the uniaxial perpendicular magnetic anisotropy constant Ku of 2.5 x 10<6> erg/cc or more is attained. Kerr rotation angle is 0.3 degree or more, which provides a magneto-optic recording medium. Since light rare earth elements having the collinear alignment of magnetic moment with Fe are used as a key element, it is possible to fabricate uniform perpendicular magnetic anisotropy thin films in a mass production scale at a low cost.</p> |
申请公布号 |
EP0184034(B1) |
申请公布日期 |
1991.01.16 |
申请号 |
EP19850114367 |
申请日期 |
1985.11.12 |
申请人 |
SUMITOMO SPECIAL METALS CO., LTD. |
发明人 |
SUZUKI, TAKAO;SAGAWA, MASATO |
分类号 |
G11B5/64 |
主分类号 |
G11B5/64 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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