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19 条记录 (耗时 0.016 秒)

    Two-layered type opto-magnetic recording medium having low-coercive force layer containing Gd and at least one of Tb and Dy
    11.
    发明公开
    Two-layered type opto-magnetic recording medium having low-coercive force layer containing Gd and at least one of Tb and Dy 失效
    具有包含GD和至少一种TB和DY的低强度力层的两层式光磁记录介质

    公开(公告)号：EP0330394A3

    公开(公告)日：1990-05-16

    申请号：EP89301599.0

    申请日：1989-02-20

    申请人： CANON KABUSHIKI KAISHA

    发明人： Kobayashi, Tadashi

    IPC分类号： G11B11/10 ,  G11B5/66

    CPC分类号： G11B11/10591 ,  G11B11/10586

    摘要： An opto-magnetic recording medium with higher stability of recorded information comprises a perpendicularly magnetizable first magnetic layer formed of a rare earth-ion amorphous alloy, and a perpendicularly magnetizable second magnetic layer formed of a rare earth-ion amorphous alloy having a higher Curie temperature and a lower coercive force than those of the first magnetic layer. The first and second magnetic layers are exchange-coupled. The second magnetic layer contains Gd and at least one of Tb and Dy. Further, in the relationship between the coercive force (H H ) of the first magnetic layer and the coercive force (H L ) of the second magnetic layer, the following equation is satisfied: where M s is the saturated magnetization of the second magnetic layer, h is the film thickness of the second magnetic layer, and σ w is the magnetic wall energy between the first and second magnetic layers.

    Apparatus and system for recording on a magnetooptical recording medium
    13.
    发明公开
    Apparatus and system for recording on a magnetooptical recording medium 失效
    金属和金属矿物Aufzeichnungsmedium

    公开(公告)号：EP0838815A3

    公开(公告)日：1998-06-17

    申请号：EP98200007.7

    申请日：1987-07-08

    申请人： CANON KABUSHIKI KAISHA

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

    IPC分类号： G11B11/10

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

    摘要： The medium (11) is provided with a first magnetic layer (2) and at least a second magnetic layer (3) having a higher Curie point temperature (Tc) and a lower coercive force than those of said first magnetic layer and being exchange coupled with said first magnetic layer is disclosed satisfying a relation: H H > H L > σ w 2M s h wherein H H is the coercive force of the first magnetic layer; H L is the coercive force of the second magnetic layer; M s is the saturation magnetization of the second magnetic layer; h is the thickness thereof; and σ w is the magnetic wall energy between the first and second magnetic layers. A recording method of such recording medium applies a magnetic field (B1) whilst irradiating the medium with a light beam (15)

    摘要翻译： 该装置和系统包括具有第一磁性层（2）和至少第二磁性层（3）的介质（11），具有比所述第一磁性层（2）更高的居里点温度（Tc）和较低的矫顽力（HL） 第一磁性层并且与所述第一磁性层交换耦合，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; 并且σw是第一和第二磁性层之间的磁壁能量，用于用调制光束照射介质（11）的装置（6,14,22）和用于向介质施加磁场的装置（24）。

    Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same
    16.
    发明公开
    Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same 失效
    具有带有两个或更多的磁性层覆盖的可能性，并使用该介质的记录方法的磁光记录介质

    公开(公告)号：EP0838814A2

    公开(公告)日：1998-04-29

    申请号：EP98200006.9

    申请日：1987-07-08

    申请人： CANON KABUSHIKI KAISHA

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

    IPC分类号： G11B11/10

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

    摘要： This apparatus and system comprise a medium (11) provided with a first magnetic layer (2) and at least a second magnetic layer (3) having a higher Curie point temperature (Tc) and a lower coercive force (H L ) than those of said first magnetic layer and being exchange coupled with said first magnetic layer satisfying a relation: H H > H L > σ w 2M s h wherein H H is the coercive force of the first magnetic layer; H L is the coercive force of the second magnetic layer; M s is the saturation magnetization of the second magnetic layer; h is the thickness thereof; and σ w is the magnetic wall energy between the first and second magnetic layers, means (6,14,22) for irradiating the medium (11) with a modulated light beam and means (24) for applying magnetic fields to the medium.

    摘要翻译： 该设备和系统包括设置有第一磁性层的介质（11）（2）和至少一个第二磁性层（3）具有比那些。所述的较高居里点温度（Tc）和下矫顽力（HL） 第一磁性层和加上满足关系所述第一磁性层是交换： worin HH是第一磁层的矫顽力; HL是第二磁性层的矫顽力; Ms为所述第二磁性层的饱和磁化强度; h是其厚度; 和sigma w是所述第一和第二磁性层之间的磁壁能量的装置（6,14,22），用于照射用于施加磁场到所述介质的调制光束和装置（24）的介质（11）。

    Two-layered type opto-magnetic recording medium having low-coercive force layer containing Gd and at least one of Tb and Dy
    18.
    发明公开
    Two-layered type opto-magnetic recording medium having low-coercive force layer containing Gd and at least one of Tb and Dy 失效
    两层具有低Koerzitifkraft组成的Gd构成的层的磁光记录介质和至少铽镝或。

    公开(公告)号：EP0330394A2

    公开(公告)日：1989-08-30

    申请号：EP89301599.0

    申请日：1989-02-20

    申请人： CANON KABUSHIKI KAISHA

    发明人： Kobayashi, Tadashi

    IPC分类号： G11B11/10 ,  G11B5/66

    CPC分类号： G11B11/10591 ,  G11B11/10586

    摘要： An opto-magnetic recording medium with higher stability of recorded information comprises a perpendicularly magnetizable first magnetic layer formed of a rare earth-ion amorphous alloy, and a perpendicularly magnetizable second magnetic layer formed of a rare earth-ion amorphous alloy having a higher Curie temperature and a lower coercive force than those of the first magnetic layer. The first and second magnetic layers are exchange-coupled. The second magnetic layer contains Gd and at least one of Tb and Dy. Further, in the relationship between the coercive force (H H ) of the first magnetic layer and the coercive force (H L ) of the second magnetic layer, the following equation is satisfied: where M s is the saturated magnetization of the second magnetic layer, h is the film thickness of the second magnetic layer, and σ w is the magnetic wall energy between the first and second magnetic layers.

    摘要翻译： 用的记录的信息更高的稳定性光磁记录介质包括形成在稀土离子非晶合金的垂直磁化第一磁性层，并形成具有高的居里温度的稀土离子的非晶合金的垂直磁化第二磁性层 和下的矫顽力比第一磁性层的。 所述第一和第二磁性层是交换耦合。 第二磁性层含有的Gd和Tb和Dy中的至少一种。 此外，在第一磁性层的矫顽力（HH）和所述第二磁性层的矫顽力（HL）之间的关系，下列等式满足：其中Ms是所述第二磁性层的饱和磁化 中，h是所述第二磁性层的膜厚度，和sigma w是所述第一和第二磁性层之间的磁壁能量。

    Opto-magnetic recording medium having plurality of exchange-coupled magnetic layers
    19.
    发明公开
    Opto-magnetic recording medium having plurality of exchange-coupled magnetic layers 失效
    OptomagnetischerAufzeichnungsträgermit einer Mehrzahl von austauschgekoppelten magnetischen Schichten。

    公开(公告)号：EP0305185A1

    公开(公告)日：1989-03-01

    申请号：EP88307900.6

    申请日：1988-08-25

    申请人： CANON KABUSHIKI KAISHA

    发明人： Kobayashi, Tadashi

    IPC分类号： G11B11/10 ,  G11B13/04

    CPC分类号： G11B11/10591 ,  G11B11/10589

    摘要： There is disclosed on opto-magnetic recording medium which comprises a substrate (1), a first magnetic layer (3) of a Gd-Fe-Co amorphous alloy formed on the substrate and having iron group sublattice magnetization superiority, saturated magnetization of which falls within the range of 25 to 125 emu/cm³, and a second magnetic layer (4) of an R-Fe-Co (wherein R is at least one element selected from the group consisting of Tb and Dy) amorphous alloy having a higher coercive force than that of the first magnetic layer (3), a lower Curie point than that, and rare earth group sublattice magnetization superiority, saturated magnetization of which falls within the range of 25 to 175 emu/cm³, and in which second magnetic layer (4) is exchange-coupled with the first magnetic layer.

    摘要翻译： 公开了一种光磁记录介质，其包括基板（1），形成在基板上的Gd-Fe-Co非晶合金的第一磁性层（3），并且具有铁组亚晶格磁化优势，其饱和磁化强度下降 在25至125emu / cm 3的范围内，以及R-Fe-Co（其中R是选自Tb和Dy中的至少一种元素）的第二磁性层（4），具有 比第一磁性层（3）更高的矫顽力，比居里点低的居里点，其饱和磁化强度在25至175emu / cm 3的范围内的稀土族亚晶格磁化优势，以及 其中第二磁性层（4）与第一磁性层交换耦合。