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公开(公告)号：US5547751A
公开(公告)日：1996-08-20
申请号：US209258
申请日：1994-03-14
申请人： Yoshio Fujii , Takashi Tokunaga , Yoshiyuki Nakaki , Kazuhiko Tsutsumi , Kazuo Hashima , Tatsuya Fukami , Yuji Kawano
发明人： Yoshio Fujii , Takashi Tokunaga , Yoshiyuki Nakaki , Kazuhiko Tsutsumi , Kazuo Hashima , Tatsuya Fukami , Yuji Kawano
IPC分类号： G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , G11B11/10506 , Y10S428/90 , Y10T428/265
摘要： A magneto-optical recording medium wherein an initializing layer is covered with a resin layer for dissipating heat from the initializing layer thereby to prevent signal degradation at high recording power and thus excellent in-record/reproduce repetition times, and the initializing layer is compositionally modulated thereby to broaden allowable ranges for the recording/reproducing light intensity and for the external magnetic field, besides the composition of a first or a second magnetic layer is controlled thereby to enhance recording sensitivity, and the exchange-coupling force between the first and second magnetic layers or the magnetic field strengthe to reverse the magnetization of the first magnetic layer is controlled thereby to enhance the recording/reproducing characteristics.
摘要翻译： 一种磁光记录介质，其中用树脂层覆盖初始化层以从初始化层散热，从而防止在高记录功率下的信号劣化，从而优良的记录/再现重复次数，并且初始化层被组成调制 从而扩大了记录/再现光强度和外部磁场的允许范围，此外控制第一或第二磁性层的组成以提高记录灵敏度，并且第一和第二磁性之间的交换耦合力 层或磁场强化以反转第一磁性层的磁化，从而增强记录/再现特性。
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公开(公告)号：US5593791A
公开(公告)日：1997-01-14
申请号：US543517
申请日：1995-10-16
申请人： Yoshio Fujii , Takashi Tokunaga , Yoshiyuki Nakaki , Kazuhiko Tsutsumi , Kazuo Hashima , Tatsuya Fukami , Yuji Kawano
发明人： Yoshio Fujii , Takashi Tokunaga , Yoshiyuki Nakaki , Kazuhiko Tsutsumi , Kazuo Hashima , Tatsuya Fukami , Yuji Kawano
IPC分类号： G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , G11B11/10506 , Y10S428/90 , Y10T428/265
摘要： A magneto-optical recording medium wherein an initializing layer is covered with a resin layer for dissipating heat from the initializing layer thereby to prevent signal degradation at high recording power and thus excellent in record/reproduce repetition times, and the initializing layer is compositionally modulated thereby to broaden allowable ranges for the recording/reproducing light intensity and for the external magnetic field, besides the composition of a first or a second magnetic layer is controlled thereby to enhance recording sensitivity, and the exchange-coupling force between the first and second magnetic layers or the magnetic field strengthe to reverse the magnetization of the first magnetic layer is controlled thereby to enhance the recording/reproducing characteristics.
摘要翻译： 一种磁光记录介质，其中初始化层被用于从初始化层散热的树脂层覆盖，从而防止在高记录功率下的信号劣化，从而优良的记录/再现重复次数，并且初始化层被组成调制 为了扩大记录/再现光强度和外部磁场的允许范围，控制第一或第二磁性层的组成，从而提高记录灵敏度，并且第一和第二磁性层之间的交换耦合力 或者磁场增强以逆转第一磁性层的磁化，从而增强记录/再现特性。
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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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4.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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5.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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公开(公告)号：US5337305A
公开(公告)日：1994-08-09
申请号：US016030
申请日：1993-02-10
申请人： Kazuo Hashima , Yuji Kawano , Tatsuya Fukami , Kazuhiko Tsutsumi , Yoshiyuki Nakaki , Takashi Tokunaga , Yoshio Fujii
发明人： Kazuo Hashima , Yuji Kawano , Tatsuya Fukami , Kazuhiko Tsutsumi , Yoshiyuki Nakaki , Takashi Tokunaga , Yoshio Fujii
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/006 , G11B7/125 , G11B7/30 , G11B11/10 , G11B11/105 , G11B7/085
CPC分类号： G11B7/126 , G11B11/10595 , G11B7/006 , G11B11/10517
摘要： An information storage system for recording and reproducing information by use of irradiating light on a medium capable of overwriting information is provided. The information storage system is capable of recording information even if the light intensity is varied so as to enhance reliability. The intensity of the light at the time of overwriting is modulated, the more intense light intensity being P.sub.H and the less intense light intensity being P.sub.L. The system includes a mechanism to keep relationship of P.sub.H +.alpha.P.sub.L equal to a constant (.alpha. being a constant depending on the recording conditions). The laser drive circuit is so adjusted that P.sub.H and P.sub.L always provide an optimal condition even if P.sub.H and/or P.sub.L vary. Thus recording can always be performed under optimal conditions to enhance the reliability of the information storage system to expand the power margin of a recording medium and to increase the percentage yield of information medium.
摘要翻译： 提供了一种用于通过在能够覆盖信息的介质上照射光来记录和再现信息的信息存储系统。 信息存储系统即使改变光强度也能够记录信息，从而提高可靠性。 调制重写时光强度，光强度越高，PH越强，光强度越小。 该系统包括保持PH +αPL的关系等于一个常数的机制（根据记录条件，α是一个常数）。 激光驱动电路如此调整，即使PH和/或PL变化，PH和PL总是提供最佳条件。 因此，可以始终在最佳条件下执行记录，以增强信息存储系统的可靠性，以扩大记录介质的功率余量并提高信息介质的产量百分比。
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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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9.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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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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