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    Opto-magnetic recording medium
    2.
    发明授权
    Opto-magnetic recording medium 失效
    光磁记录介质

    公开(公告)号：US4675767A

    公开(公告)日：1987-06-23

    申请号：US679314

    申请日：1984-12-07

    申请人： Yoichi Osato ,  Ichiro Saito ,  Kozo Arao ,  Eiichi Fujii ,  Yoshio Takasu

    发明人： Yoichi Osato ,  Ichiro Saito ,  Kozo Arao ,  Eiichi Fujii ,  Yoshio Takasu

    IPC分类号： G11B11/105 ,  G11B5/74 ,  G11B5/32

    CPC分类号： G11B11/10586

    摘要： There is disclosed a magnetooptical recording medium, which is provided with a recording layer composed of a magnetic layer having an easy axis of magnetization perpendicular to the surface of recording layer, and a reflective layer positioned adjacent to the recording layer and composed of a mixture of a substance of a low absorbance to the light of a determined wavelength and a substance of a high reflectivity to the above-mentioned light.

    摘要翻译： 公开了一种磁光记录介质，其设置有由磁性层组成的记录层，该磁性层具有垂直于记录层表面的易磁化轴;以及与记录层相邻的反射层， 对所确定的波长的光具有低吸光度的物质和对上述光具有高反射率的物质。

    Opto-magnetic recording medium
    3.
    发明授权
    Opto-magnetic recording medium 失效
    光磁记录介质

    公开(公告)号：US4664977A

    公开(公告)日：1987-05-12

    申请号：US717650

    申请日：1985-03-29

    申请人： Yoichi Osato ,  Eiichi Fujii ,  Ichiro Saito ,  Kozo Arao

    发明人： Yoichi Osato ,  Eiichi Fujii ,  Ichiro Saito ,  Kozo Arao

    IPC分类号： G06K19/08 ,  G11B5/64 ,  G11B11/10 ,  G11B11/105 ,  G11B7/24

    CPC分类号： G11B5/64 ,  G11B11/10586 ,  G11B11/10593 ,  Y10S428/90 ,  Y10T428/265

    摘要： An opto-magnetic recording medium comprises a recording layer formed of a magnetic film having a readily magnetizable axis in a direction perpendicular to the surface of the film, and a reflective and phase modulating layer provided in contact with the recording layer. The reflective and phase modulating layer is formed so that the imaginary number portion (k) of the refractive index gradually increases in the direction of thickness away from that side which is in contact with the recording layer.

    摘要翻译： 光磁记录介质包括由垂直于膜表面的方向上具有容易磁化的轴的磁性膜形成的记录层以及设置成与记录层接触的反射和相位调制层。 反射和相位调制层被形成为使得折射率的虚数部分（k）在远离与记录层接触的那侧的厚度方向上逐渐增加。

    Method for producing a magnetooptical recording medium
    5.
    发明授权
    Method for producing a magnetooptical recording medium 失效
    磁光记录介质的制造方法

    公开(公告)号：US5525378A

    公开(公告)日：1996-06-11

    申请号：US296163

    申请日：1994-08-26

    申请人： Yoichi Osato ,  Hisaaki Kawade ,  Eiichi Fujii ,  Nobuhiro Kasama ,  Tadashi Kobayashi

    发明人： Yoichi Osato ,  Hisaaki Kawade ,  Eiichi Fujii ,  Nobuhiro Kasama ,  Tadashi Kobayashi

    IPC分类号： G11B11/105 ,  H05H1/00

    CPC分类号： G11B11/10506 ,  G11B11/10519 ,  G11B11/10586 ,  G11B11/10591 ,  Y10T428/26

    摘要： A magnetooptical recording medium provided with a first magnetic layer and a second magnetic layer having a higher Curie point and a lower coercive force than the first magnetic layer and being exchange coupled with the first magnetic layer satisfies the relation: ##EQU1## wherein H.sub.H is the coercive force of the first magnetic layer; H.sub.L is the coercive force of the second magnetic layer; M.sub.s is the saturation magnetization of the second magnetic layer; h is the thickness thereof; and .sigma..sub.w is the magnetic wall energy between the first and second magnetic layers.

    摘要翻译： 具有第一磁性层和具有比第一磁性层更高的居里点和较低的矫顽力并与第一磁性层交换耦合的第二磁性层的磁光记录介质满足以下关系：其中HH是 第一磁性层的矫顽力; HL是第二磁性层的矫顽力; Ms是第二磁性层的饱和磁化强度; h是其厚度; σw是第一和第二磁性层之间的磁壁能量。

    Magnetooptical recording medium allowing overwriting with two or more magnetic layers
    6.
    发明授权
    Magnetooptical recording medium allowing overwriting with two or more magnetic layers 失效
    允许使用两个或多个磁性层重写的磁光记录介质和利用该磁光记录介质的记录方法

    公开(公告)号：US6028824A

    公开(公告)日：2000-02-22

    申请号：US80215

    申请日：1998-05-18

    申请人： Yoichi Osato ,  Hisaaki Kawade ,  Eiichi Fujii ,  Nobuhiro Kasama ,  Tadashi Kobayashi

    发明人： Yoichi Osato ,  Hisaaki Kawade ,  Eiichi Fujii ,  Nobuhiro Kasama ,  Tadashi Kobayashi

    IPC分类号： G11B11/105 ,  G11B11/00 ,  G11B5/66

    CPC分类号： G11B11/10519 ,  G11B11/10591 ,  G11B11/10506

    摘要： A magnetooptical recording medium provided with a first magnetic layer and a second magnetic layer having a higher Curie point and a lower coercive force than the first magnetic layer and being exchange coupled with the first magnetic layer satisfies the relation: ##EQU1## wherein H.sub.H is the coercive force of the first magnetic layer; H.sub.L is the coercive force of the second magnetic layer; M.sub.s is the saturation magnetization of the second magnetic layer; h is the thickness thereof; and .sigma..sub.w is the magnetic wall energy between the first and second magnetic layers.

    摘要翻译： 具有第一磁性层和具有比第一磁性层更高的居里点和较低的矫顽力并与第一磁性层交换耦合的第二磁性层的磁光记录介质满足以下关系：其中HH是矫顽力 第一磁性层; HL是第二磁性层的矫顽力; Ms是第二磁性层的饱和磁化强度; h是其厚度; σw是第一和第二磁性层之间的磁壁能量。

    Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same
    8.
    发明授权
    Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same 失效
    允许使用两个或多个磁性层重写的磁光记录介质和利用该磁光记录介质的记录方法

    公开(公告)号：US5481410A

    公开(公告)日：1996-01-02

    申请号：US312930

    申请日：1994-09-30

    申请人： Yoichi Osato ,  Hisaaki Kawade ,  Eiichi Fujii ,  Nobuhiro Kasama ,  Tadashi Kobayashi

    发明人： Yoichi Osato ,  Hisaaki Kawade ,  Eiichi Fujii ,  Nobuhiro Kasama ,  Tadashi Kobayashi

    IPC分类号： G11B11/105 ,  G11B13/04

    CPC分类号： G11B11/10506 ,  G11B11/10519 ,  G11B11/10586 ,  G11B11/10591 ,  Y10T428/26

    摘要： A magnetooptical recording medium is provided with a transparent substrate, a first magnetic layer, a second magnetic layer having a higher Curie point and a lower coercive force than those of the first magnetic layer and being exchange coupled with the first magnetic layer. The medium further includes a third magnetic layer located between the first and second magnetic layers, so that the first magnetic layer is closer to the transparent substrate than the second and third magnetic layers and the third magnetic layer is closer to the transparent substrate than the second magnetic layer. Also disclosed is a process for recording on such a medium.

    摘要翻译： 磁光记录介质设置有透明基板，第一磁性层，具有比第一磁性层更高的居里点和更低的矫顽力的第二磁性层，并与第一磁性层交换耦合。 所述介质还包括位于所述第一和第二磁性层之间的第三磁性层，使得所述第一磁性层比所述第二和第三磁性层更靠近所述透明基板，并且所述第三磁性层比所述第二磁性层更靠近所述透明基板 磁性层。 还公开了在这种介质上进行记录的过程。

    Magneto-optical reproducing method using a reproducing layer of horizontal magnetized state at room temperature
    10.
    发明授权
    Magneto-optical reproducing method using a reproducing layer of horizontal magnetized state at room temperature 失效
    在室温下使用水平磁化状态的再现层的磁光再现方法

    公开(公告)号：US5793712A

    公开(公告)日：1998-08-11

    申请号：US729764

    申请日：1996-10-07

    申请人： Naoki Nishimura ,  Eiichi Fujii

    发明人： Naoki Nishimura ,  Eiichi Fujii

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

    CPC分类号： G11B11/10589 ,  G11B11/10504 ,  G11B11/10515 ,  Y10S428/90

    摘要： A method of recording and reproducing information on a magnetooptical recording medium includes the steps of irradiating the medium with laser light to heat a reproducing layer at least to a predetermined temperature at which the layer is vertically magnetizable, thereby rendering the reproducing layer vertically magnetizable and causing it to effect exchange coupling with a recording layer. The method also includes the step of applying a vertical external magnetic field to a portion of the medium irradiated with the laser light and applying a horizontal external magnetic field, weaker than the vertical external magnetic field, during recording and reproducing of data.

    摘要翻译： 一种在磁光记录介质上记录和再现信息的方法包括以下步骤：用激光照射介质，以将再生层加热到至少一层可垂直磁化的预定温度，从而使再现层可垂直磁化并引起 它实现与记录层的交换耦合。 该方法还包括在记录和再现数据期间向照射激光的介质的一部分施加垂直外部磁场并施加比垂直外部磁场弱的水平外部磁场的步骤。