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公开(公告)号：US5638344A
公开(公告)日：1997-06-10
申请号：US564910
申请日：1995-11-29
IPC分类号： G11B11/105 , G11B11/00
CPC分类号： G11B11/10586 , G11B11/10515 , G11B11/10517 , G11B11/10521 , G11B11/10526 , G11B11/10506 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A multi-layer magneto-optic recording medium having an information recording layer and an initializing layer that can be overwritten by light modulation, and in which adjacent layers, including auxiliary layers provided for more efficient transfer from the initializing layer to the recording layer, are coupled by an exchange force. This structure enables high-density, high-speed recording of audio information, visual information, and computer data.
摘要翻译： 一种具有信息记录层和可被光调制覆盖的初始化层的多层磁光记录介质，其中包括提供用于从初始化层到记录层的更有效传送的辅助层的相邻层是 加上交流力量。 这种结构可以实现音频信息，视觉信息和计算机数据的高密度，高速记录。
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公开(公告)号：US5216663A
公开(公告)日：1993-06-01
申请号：US474104
申请日：1990-04-20
IPC分类号： G11B11/105
CPC分类号： G11B11/10586 , G11B11/10506 , G11B11/10519 , G11B11/10582 , G11B11/10584
摘要： This invention relates to a multi-layer magneto-optic recording medium having an information recording layer and an initializing layer that can be overwritten by light modulation, and in which adjacent layers, including auxiliary layers provided for more efficient transfer from the initializing layer to the recording layer, are coupled by an exchange force. This structure enables high-density, high-speed recording of audio information, visual information, and computer data.
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公开(公告)号：US5258237A
公开(公告)日：1993-11-02
申请号：US815547
申请日：1991-12-27
IPC分类号： G11B5/667 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10517 , G11B11/10506 , G11B11/10523 , G11B11/10586 , Y10S428/90
摘要： A megneto-optic recording medium which is comprised of a first, a second, a third and a fourth magnetic layers coupled each other between the adjacent layers by an exchange force, wherein said first through fourth magnetic layers satisfy T.sub.c1
摘要翻译： 一种兆光记录介质，其由通过交换力在相邻层之间彼此耦合的第一，第二，第三和第四磁性层组成，其中所述第一至第四磁性层满足Tc1
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公开(公告)号：US5679455A
公开(公告)日：1997-10-21
申请号：US482021
申请日：1995-06-07
IPC分类号： G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , G11B11/10515 , G11B11/10517 , G11B11/10521 , G11B11/10526 , G11B11/10506 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： This invention relates to a multi-layer magneto-optic recording medium having an information recording layer and an initializing layer that can be overwritten by light modulation, and in which adjacent layers, including auxiliary layers provided for more efficient transfer from the initializing layer to the recording layer, are coupled by an exchange force. This structure enables high-density, high-speed recording of audio information, visual information, and computer data.
摘要翻译： 本发明涉及一种具有信息记录层和可被光调制覆盖的初始化层的多层磁光记录介质，其中包括辅助层的相邻层被提供用于从初始化层到 记录层通过交换力耦合。 这种结构可以实现音频信息，视觉信息和计算机数据的高密度，高速记录。
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公开(公告)号：US5512366A
公开(公告)日：1996-04-30
申请号：US615024
申请日：1990-11-13
IPC分类号： G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , G11B11/10515 , G11B11/10517 , G11B11/10521 , G11B11/10526 , G11B11/10506 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： This invention relates to a multi-layer magneto-optic recording medium having an information recording layer and an initializing layer that can be overwritten by light modulation, and in which adjacent layers, including auxiliary layers provided for more efficient transfer from the initializing layer to the recording layer, are coupled by an exchange force. This structure enables high-density, high-speed recording of audio information, visual information, and computer data.
摘要翻译： 本发明涉及一种具有信息记录层和可被光调制覆盖的初始化层的多层磁光记录介质，其中包括辅助层的相邻层被提供用于从初始化层到 记录层通过交换力耦合。 这种结构可以实现音频信息，视觉信息和计算机数据的高密度，高速记录。
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公开(公告)号：US5347485A
公开(公告)日：1994-09-13
申请号：US25250
申请日：1993-03-02
申请人： Motohisa Taguchi , Tatsuya Fukami , Kazuo Hashima , Yukari Toide , Yuji Kawano , Yoshio Fujii , Takashi Tokunaga , Yoshiyuki Nakaki , Kazuhiko Tsutsumi , Hiroshi Kobayashi , Yuzou Ohdoi , Shinji Tanabe , Hiroshi Shibata
发明人： Motohisa Taguchi , Tatsuya Fukami , Kazuo Hashima , Yukari Toide , Yuji Kawano , Yoshio Fujii , Takashi Tokunaga , Yoshiyuki Nakaki , Kazuhiko Tsutsumi , Hiroshi Kobayashi , Yuzou Ohdoi , Shinji Tanabe , Hiroshi Shibata
摘要： A magnetic thin film memory wherein the memory is composed of magnetic thin films with a layer of a higher coercive force and a layer of a lower coercive force via a nonmagnetic layer laminated repetitively, or magnetic thin films having the easy magnetization axis which lies between the perpendicular and the horizontal directions of the magnetic thin film, and information is recorded on the layer of a lower coercive force, or information is recorded by changing the direction of the magnetization by means of a magnetic field applied by two recording lines which cross the magnetic thin film, thereby to obtain a sufficient amplitude of reproduction signal even when the size of the memory is reduced.
摘要翻译： 一种磁性薄膜存储器，其中存储器由具有较高矫顽力的层的磁性薄膜和重复层叠的非磁性层的矫顽力较低的层组成，或者具有容易磁化轴的磁性薄膜位于 磁性薄膜的垂直方向和水平方向，信息被记录在矫顽力较低的层上，或通过利用穿过磁性体的两条记录线施加的磁场改变磁化方向来记录信息 从而即使当存储器的尺寸减小时也获得足够的再现信号幅度。
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公开(公告)号：US5208797A
公开(公告)日：1993-05-04
申请号：US612798
申请日：1990-11-14
IPC分类号： G11B11/10 , G11B11/105 , G11B13/00
CPC分类号： G11B11/10586 , G11B11/10506 , G11B11/10521
摘要： In a magneto-optical recording system for recording information with bits having upward magnetization and having downward magnetization on a recording layer of a magneto-optical recording medium, having four magnetic layers exchange-coupled with each other. A laser beam directed onto the medium is modulated to heat the magneto-optical recording medium to two values, for "High" writing and for "Low" writing. During "High" writing, the first to third layers lose magnetization because their Curie temperatures are exceeded, and the direction of the magnetization of the first layer, which is the recording layer is determined mainly by the magnetostatic coupling from the the fourth layer. During "Low" writing, the first and the third layers lose their magnetization as their Curie temperatures are exceeded, and the direction of the magnetization of the first layer is determined by the exchange coupling from the second layer, which in turn is dependent on the exchange coupling from the fourth layer.
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8.发明授权Magnetooptical recording medium including five magnetic layers for direct overriding by light intensity modulation without an external bias field 失效包含五个磁性层的磁记录介质，通过没有外部偏置场的光强度调制直接覆盖
公开(公告)号：US5191561A
公开(公告)日：1993-03-02
申请号：US757685
申请日：1991-09-11
IPC分类号： G11B11/105
CPC分类号： G11B11/10586 , G11B11/10584 , G11B11/10506
摘要： This invention relates to a magnetooptical recording medium that is capable of direct overwriting by light intensity modulation without using a separate source for generating an external magnetic field and that has four magnetic layers superposed on a substrate, wherein said magnetic layers has vertical magnetic anisotropy and any two adjacent layers being bound by exchange force. The medium is characterized in that a fifth magnetic layer not bound by exchange force is provided over the fourth magnetic layer or that a layer made of a rare earth element/transition metal alloy in which the magnetization of rare earth elements is dominant is provided between the first and second magnetic layers which are bound together by exchange force.
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9.发明授权Overwritable, high-density magneto-optical recording medium and recording/reproduction method therefor 失效可重写的高密度磁光记录介质及其记录/再现方法
公开(公告)号：US5764600A
公开(公告)日：1998-06-09
申请号：US464371
申请日：1995-06-05
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10515 , G11B11/10506 , G11B11/10521 , G11B11/10584 , G11B11/10586 , Y10S428/90
摘要： A recording/reproduction method for recording or reproducing information using the magneto-optical recording medium, the magneto-optical recording medium comprising a first magnetic layer comprising a rare earth-transition metal alloy or a ferromagnetic material containing a magnetic transition metal, a second magnetic layer comprising a rare earth-transition metal alloy, a third magnetic layer comprising a rare earth-transition metal alloy, a fourth magnetic layer comprising a rare earth-transition metal alloy, a fifth magnetic layer comprising a rare earth-transition metal alloy, and a sixth magnetic layer comprising a rare earth-transition metal alloy, the second to sixth magnetic layers being stacked in this order on the first magnetic layer, adjacent layers of the second to sixth magnetic layers being coupled by an exchange force thereof.
摘要翻译： 一种用于使用磁光记录介质记录或再现信息的记录/再现方法，该磁光记录介质包括由稀土 - 过渡金属合金构成的第一磁性层或含有磁性过渡金属的铁磁材料，第二磁性层 包含稀土 - 过渡金属合金的层，包含稀土金属过渡金属合金的第三磁性层，包含稀土金属合金的第四磁性层，包含稀土 - 过渡金属合金的第五磁性层和 包括稀土 - 过渡金属合金的第六磁性层，所述第二至第六磁性层依次堆叠在所述第一磁性层上，所述第二至第六磁性层的相邻层通过其交换力耦合。
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10.发明授权Overwritable, high-density magneto-optical recording medium and recording/reproduction method therefor 失效可重写的高密度磁光记录介质及其记录/再现方法
公开(公告)号：US5449566A
公开(公告)日：1995-09-12
申请号：US107157
申请日：1993-08-17
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10515 , G11B11/10506 , G11B11/10521 , G11B11/10584 , G11B11/10586 , Y10S428/90
摘要： A magneto-optical recording medium allowing both direct overwriting by light power modulation and superresolutive reproduction, and a recording/reproduction method therefor are provided. The magneto-optical recording medium includes six magnetic layers of which adjacent layers are coupled by an exchange force thereof, the first magnetic layer being made of a rare earth-transition metal alloy or a ferromagnetic material containing a magnetic transition metal, the second to sixth magnetic layers being each composed of a rare earth-transition metal alloy. Each of the magnetic layers has a predetermined Curie temperature, and the respective transition metal sub-lattice magnetization directions of the first to third magnetic layers (including the magnetization direction of the first layer) are aligned in one direction at room temperature while at the same time those of the fourth to sixth magnetic layers are aligned in one direction at room temperature. In the recording/reproduction method there are applied external magnetic fields of the same direction for recording and for reproduction, respectively.
摘要翻译： 提供允许通过光功率调制和超分辨再现进行直接重写的磁光记录介质及其记录/再现方法。 磁光记录介质包括六个磁性层，其相邻层通过其交换力耦合，第一磁性层由稀土 - 过渡金属合金或含有磁性过渡金属的铁磁材料制成，第二至第六层 磁性层各自由稀土 - 过渡金属合金构成。 每个磁性层具有预定的居里温度，并且第一至第三磁性层（包括第一层的磁化方向）的各自的过渡金属亚晶格磁化方向在室温下沿一个方向排列，同时 第四至第六磁性层的时间在室温下沿一个方向排列。 在记录/再现方法中，分别应用相同方向的外部磁场用于记录和再现。
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