| 摘要 |
PROBLEM TO BE SOLVED: To improve the reproduction characteristic of a magnetooptical recording medium subjected to high-density recording with fine bit. SOLUTION: This magneto-optical recording medium is constituted by laminating a dielectric layer 12, a reproducing layer 13 consisting of GdFeCo, a control layer 14 consisting of GdDyFeCo, an intermediate layer 15 consisting of GdFeCo, a recording layer 16 consisting of TbFeCo, a protective layer 17, a heat radiation layer 18 and a UV coating layer 19 on a substrate 11. The Curie temp. Tc of the control layer 14 is 230 deg.C, is about the same as TC = 230 deg.C of the intermediate layer 15 and is lower than TC = 300 deg.C of the reproducing layer 13. The perpendicular magnetic anisotropy Ku of the control layer 14 is 6×10<5> erg/cm<2> and is larger than the perpendicular magnetic anisotropy Ku = 3×10<5> erg/cm<2> . The transfer power between the intermediate layer 15 and the reproducing layer 13 is intensified by the control layer 14 and C/N is increased.
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