| 摘要 |
PURPOSE:To enable satisfactory overwriting by forming a magnetic layer having a specified two-layered structure, incorporating a nonmagnetic element into the second magnetic layer so as to reduce exchange force applied to the second magnetic layer and using the resulting magneto-optical recording medium. CONSTITUTION:A perpendicularly magnetizable film having a two-layered struc ture subjected to exchange coupling is formed on a substrate 1 to obtain a magneto-optical recording medium. The film consists of a first magnetic layer 2 having a low Curie point TL and high coercive force HH and a second mag netic layer 3 having a higher Curie point TH and lower coercive force HL than the layer 2 and satisfies inequality I (where Ms is the saturation magnetization of the layer 3, (h) is the thickness of the layer 3 and sigmaw is the domain wall energy between the layers 2, 3). Each of the layers 2, 3 contains an amorphous alloy of a rare earth element and transition metal as the principal component and the layer 3 contains an element having no ferromagnetism at room temp. (nonmagnetic element). When the recording medium is used, satisfactory overwrit ing is enabled.
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