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    Magneto-optical recording medium having first and second magnetic layers
    1.
    发明授权
    Magneto-optical recording medium having first and second magnetic layers 失效
    具有第一和第二磁性层的磁光记录介质

    公开(公告)号：US5420833A

    公开(公告)日：1995-05-30

    申请号：US154169

    申请日：1993-11-17

    申请人： Motoharu Tanaka ,  Atsuyuki Watada ,  Masaetsu Takahashi ,  Hiroshi Deguchi ,  Toshiaki Tokita ,  Yoshiko Kurosawa

    发明人： Motoharu Tanaka ,  Atsuyuki Watada ,  Masaetsu Takahashi ,  Hiroshi Deguchi ,  Toshiaki Tokita ,  Yoshiko Kurosawa

    IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B11/00

    CPC分类号： G11B11/10517 ,  G11B11/10506 ,  G11B11/10586

    摘要： A magneto-optical recording medium is composed of a first magnetic layer and a second magnetic layer, which are overlaid, each having a perpendicular magnetic anisotropy, and the first magnetic layer having a Curie temperature of Tc.sub.1, a saturation magnetization of Ms.sub.1, a coercive force of Hc.sub.1, and a thickness of t.sub.1, the second magnetic layer having a compensation temperature of Tcomp.sub.2, a Curie temperature Tc.sub.2, and a coercive force of Hc.sub.2, and which satisfies the relationships:Troom Hc.sub.2Hc.sub.1 >.sigma.w/2Ms.sub.1 t.sub.1wherein Troom is room temperature, and .sigma.w is the interface wall energy between the first magnetic wall and the second magnetic wall, and a magneto-optical recording method using this magneto-optical recording medium is provided, in which the application of a magnetic field for initialization of the magneto-optical recording medium is not required.

    摘要翻译： 磁光记录介质由重叠的每个具有垂直磁各向异性的第一磁性层和第二磁性层构成，第一磁性层具有Tc1的居里温度，Ms1的饱和磁化强度，矫顽力 Hc1的力，厚度t1，第二磁性层的补偿温度为Tcomp2，居里温度Tc2，矫顽力为Hc2，满足关系：Troom Hc2 Hc1 > sigma w / 2Ms1t1其中Troom是室温，sigma w是第一磁壁和第二磁壁之间的界面壁能，并且提供了使用该磁光记录介质的磁光记录方法，其中 不需要施加用于磁光记录介质的初始化的磁场。

    Magneto-optical recording method
    2.
    发明授权
    Magneto-optical recording method 失效
    磁光记录方法

    公开(公告)号：US5459701A

    公开(公告)日：1995-10-17

    申请号：US900172

    申请日：1992-06-17

    申请人： Toshiaki Tokita ,  Motoharu Tanaka ,  Atsuyuki Watada ,  Yoshiko Kurosawa

    发明人： Toshiaki Tokita ,  Motoharu Tanaka ,  Atsuyuki Watada ,  Yoshiko Kurosawa

    IPC分类号： G11B11/105 ,  G11B13/04

    CPC分类号： G11B11/1053 ,  G11B11/10517

    摘要： A magneto-optical recording method is capable of carrying out overwriting on a magneto-optical recording medium including a single perpendicular magnetic layer serving as a recording layer, by applying laser beams thereto, thereby controlling the formation and erasure of magnetic domains, in which a magnetic domain with a desired length can be formed or erased by the application of a plurality of laser beams during the formation and erasure of the magnetic domains.

    摘要翻译： 磁光记录方法能够通过对其进行激光束而在包括用作记录层的单个垂直磁性层的磁光记录介质上进行重写，从而控制磁畴的形成和擦除，其中 可以通过在磁畴的形成和擦除期间施加多个激光束来形成或擦除具有期望长度的磁畴。