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    • 48. 发明授权
    • Magneto optical recording medium including a plurality of magnetic
layers and a method for reducing thereof
    • 包括多个磁性层的磁光记录介质及其还原方法
    • US5627803A
    • 1997-05-06
    • US512978
    • 1995-08-09
    • Nobuyasu Negishi
    • Nobuyasu Negishi
    • G11B11/10G11B11/105G11B11/00G11B5/70
    • G11B11/10586G11B11/10515
    • A magneto optical recording medium is provided with: a record layer, to which information is recorded as a directional condition of magnetization thereof and which comprises a magnetic substance having a Curie temperature Tc.sub.2 ; a reproduction layer, to which the magnetization of the record layer is transferred at a predetermined reproducing temperature Tpb and which comprises a magnetic substance having a Curie temperature Tc.sub.0 ; an intermediate layer disposed between the record layer and the reproduction layer and comprising a magnetic substance having a Curie temperature Tc.sub.1 for allowing the magnetization of the record layer to be transferred therethrough at a temperature lower than the Curie temperature Tc.sub.1 by a switched connection force between the record layer and the intermediate layer and by a switched connection force between the intermediate layer and the reproduction layer, and for disallowing the magnetization of the record layer to be transferred therethrough at a temperature not lower than the Curie temperature Tc.sub.1 ; and an intermediate auxiliary layer interposed between the record layer and the intermediate layer and comprising a magnetic substance having a Curie temperature Tc.sub.3 for increasing the switched connection force between the record layer and the intermediate layer. The Curie temperatures satisfy conditions of: Tc.sub.1
    • 磁光记录介质具有记录层,信息被记录为其磁化方向条件,并且包括具有居里温度Tc2的磁性物质; 记录层的磁化以预定的再现温度Tpb传送到其上并且包括具有居里温度Tc0的磁性物质的再现层; 设置在记录层和再现层之间的中间层,并且包括具有居里温度Tc1的磁性物质,用于允许记录层的磁化在低于居里温度Tc1的温度下通过其间的切换连接力传递 记录层和中间层以及中间层和再生层之间的切换连接力,并且不允许在不低于居里温度Tc1的温度下将记录层的磁化转移到其中; 以及介于记录层和中间层之间的中间辅助层,并且包括用于增加记录层和中间层之间的切换连接力的居里温度Tc3的磁性物质。 居里温度满足以下条件:Tc1