MAGNETO-OPTICAL RECORDING MEDIUM AND PRODUCTION THEREOF

摘要

PURPOSE:To increase Kerr rotating power and to obtain perpendicular anisotropy and large coercive force by using a thin PtMnSb film having a superfine columnar crystal structure. CONSTITUTION:The thin PtMnSb film having the superfine columnar crystal structure is formed of the superfine columnar crystals 3 of the PtMnSb formed on the projections 2 of a substrate 1. The large coercive force of >=5,000Oe and the perpendicular magnetization predominance are provided to this thin film. The form such as grain size of the superfine columnar crystals depends on the size and distribution density of the fine projections on the substrate surface and the formed by using the substrate having the adequate fine projections on the surface.