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公开(公告)号：US5838645A
公开(公告)日：1998-11-17
申请号：US866594
申请日：1997-05-30
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10515 , G11B11/10586
摘要： A magneto-optical disk provided with a record layer having a recording magnetic domain where data are recorded, an auxiliary reproduction layer for transferring the record data in the record layer to a reproduction layer by generating a floating magnetic field corresponding to the data in the record layer, and the reproduction layer from which the data are read out through irradiation of a light beam, which are sequentially layered while interposing nonmagnetic intermediate layers therebetween. The stable magnetic domain width in the auxiliary reproduction layer is shorter than the recording magnetic domain width at room temperature and extends as the temperature rises and becomes longer at or above a first temperature. The stable magnetic domain width in the reproduction layer is longer than the recording magnetic domain width at room temperature and lessens as the temperature rises and becomes shorter at or above a second temperature which is lower than the first temperature. The first and second temperatures satisfy a condition expressed as: room temperature
摘要翻译： 具有记录数据的记录磁畴的磁光盘，用于通过产生与记录中的数据相对应的浮动磁场将记录层中的记录数据传送到再现层的辅助再现层 层，以及通过照射光束从中读出数据的再现层，它们在其间插入非磁性中间层的顺序层叠。 辅助再生层中的稳定的磁畴宽度比室温下的记录磁畴宽度短，随着温度升高而延长，在第一温度以上也变长。 再生层中的稳定的磁畴宽度比室温下的记录磁畴宽度长，随着温度的升高而降低，在比第一温度低的第二温度以上也变短。 第一和第二温度满足条件表示为：室温<第二温度<第一温度APPROXLESS光束点中的最大温度。 因此，在再现层中立即产生并擦除反向磁畴，并且所得到的再现信号是矩形信号，从而可以提供能够精确地再现高密度记录数据的磁光记录介质。
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公开(公告)号：US5684764A
公开(公告)日：1997-11-04
申请号：US595259
申请日：1996-02-01
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10515 , G11B11/10586
摘要： A magneto-optical disk provided with a record layer having a recording magnetic domain where data are recorded, an auxiliary reproduction layer for transferring the record data in the record layer to a reproduction layer by generating a floating magnetic field corresponding to the data in the record layer, and the reproduction layer from which the data are read out through irradiation of a light beam, which are sequentially layered while interposing non-magnetic intermediate layers therebetween. The stable magnetic domain width in the auxiliary reproduction layer is shorter than the recording magnetic domain width at room temperature and extends as the temperature rises and becomes longer at or above a first temperature. The stable magnetic domain width in the reproduction layer is longer than the recording magnetic domain width at room temperature and lessens as the temperature rises and becomes shorter at or above a second temperature which is lower than the first temperature. The first and second temperatures satisfy a condition expressed as: room temperature
摘要翻译： 具有记录数据的记录磁畴的磁光盘，用于通过产生与记录中的数据相对应的浮动磁场将记录层中的记录数据传送到再现层的辅助再现层 层，以及通过照射光束从中读出数据的再现层，它们在介于其间的非磁性中间层的顺序层叠。 辅助再生层中的稳定的磁畴宽度比室温下的记录磁畴宽度短，随着温度升高而延长，在第一温度以上也变长。 再生层中的稳定的磁畴宽度比室温下的记录磁畴宽度长，随着温度的升高而降低，在比第一温度低的第二温度以上也变短。 第一和第二温度满足表示为：室温<第二温度<第一温度
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公开(公告)号：US5659537A
公开(公告)日：1997-08-19
申请号：US459338
申请日：1995-06-02
IPC分类号： G11B11/10 , G11B11/105 , G11B7/00
CPC分类号： G11B11/10593 , G11B11/10515 , G11B11/10584
摘要： A recording layer including a recording magnetic domain for recording thereon information is formed. A reproducing layer for reproducing information by projecting thereto a light beam is formed on the recording layer. A non-magnetic intermediate layer for intercepting a magnetic exchange coupling force exerted between the recording layer and the reproducing layer is formed between the recording layer and the reproducing layer. The reproducing layer is arranged such that the width of the stable magnetic domain on the reproducing layer at room temperature is larger than the width of the recording magnetic domain in the recording layer. At a reproducing temperature by the light beam, the width of the stable magnetic domain becomes smaller than the width of the recording magnetic domain, and the information is copied by the leakage magnetic flux of the recording magnetic domain. Depending on whether or not the information transferred to the reproducing layer is reproduced, the effects from other magnetic domain adjacent to the magnetic domain to be reproduced from the reproducing layer can be prevented, thereby enabling a high density recording of information on the recording layer.
摘要翻译： 形成包括用于在其上记录信息的记录磁畴的记录层。 在记录层上形成用于通过向其投射光来再现信息的再现层。 在记录层和再现层之间形成用于截取在记录层和再现层之间施加的磁交换耦合力的非磁性中间层。 再现层被布置成使得在室温下再现层上的稳定磁畴的宽度大于记录层中记录磁畴的宽度。 在光束的再现温度下，稳定磁畴的宽度变得小于记录磁畴的宽度，并且通过记录磁畴的泄漏磁通来复制信息。 根据传送到再现层的信息是否被再现，可以防止从再现层再现的与磁畴相邻的其它磁畴的影响，从而能够在记录层上高密度地记录信息。
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74.发明授权Magneto-optical recording medium with multiple magnetic layers and methods related thereto 失效具有多个磁性层的磁光记录介质及其相关方法
公开(公告)号：US5936916A
公开(公告)日：1999-08-10
申请号：US18267
申请日：1998-02-04
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00 , G11B5/66
CPC分类号： G11B11/10584 , G11B11/10519 , G11B11/10586 , G11B11/10506
摘要： If the Curie points of the first magnetic layer, second magnetic layer, third magnetic layer and fourth magnetic layer of alloys of rare-earth metal and transition metal as ferrimagnetic materials showing perpendicular magnetization from room temperature to their Curie points are indicated as Tc1, Tc2, Tc3 and Tc4, respectively, the Curie points and room temperature are related by: room temperature
摘要翻译： 如果作为铁氧体材料的稀土金属和过渡金属的合金的第一磁性层，第二磁性层，第三磁性层和第四磁性层的居里点显示出从室温到居里点的垂直磁化率，表示为Tc1，Tc2 ，Tc3和Tc4，居里点和室温分别与室温
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75.发明授权
公开(公告)号：US5633838A
公开(公告)日：1997-05-27
申请号：US582481
申请日：1996-01-03
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10515 , G11B11/10586
摘要： A non-magnetic intermediate layer is provided between a reproductive layer and a recording layer. The reproductive layer is composed of a first reproductive layer and a second reproductive layer. When the first reproductive layer has a temperature that is higher than a first critical temperature, its stable magnetic domain width becomes smaller than a recording magnetic domain width so that the magnetization is reversed. When the second reproductive layer has a temperature that is higher than a second critical temperature, its stable magnetic domain width becomes larger than the recording magnetic domain width so that the reversed magnetic domain is collapsed. The first critical temperature is lower than the second critical temperature. A reproductive output having abrupt rising and falling can be obtained by the generation and the collapse of the reverse magnetic domain on the reproductive layer. For this reason, higher density recording required for larger capacity can be achieved.
摘要翻译： 在生殖层和记录层之间设置非磁性中间层。 生殖层由第一生殖层和第二生殖层组成。 当第一生殖层具有高于第一临界温度的温度时，其稳定的磁畴宽度变得小于记录磁畴宽度，使得磁化反转。 当第二生殖层具有高于第二临界温度的温度时，其稳定的磁畴宽度变得大于记录磁畴宽度，使得反向磁畴被折叠。 第一临界温度低于第二临界温度。 具有突然上升和下降的生殖输出可以通过生殖层上的反向磁畴的产生和崩溃获得。 为此，可以实现更大容量所需的更高密度的记录。
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公开(公告)号：US6010780A
公开(公告)日：2000-01-04
申请号：US986994
申请日：1997-12-08
申请人： Junichiro Nakayama , Go Mori , Michinobu Mieda , Akira Takahashi
发明人： Junichiro Nakayama , Go Mori , Michinobu Mieda , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , G11B11/10584 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magneto-optical memory medium is provided, on a substrate, with a first magnetic layer, which shows in-plane magnetization at room temperature and perpendicular magnetization above a certain temperature, and a second magnetic layer, which shows perpendicular magnetization within a range from room temperature up to its Curie temperature. The first magnetic layer is made up of alternating films of rare earth metals and transition metals. As a result, a magneto-optical memory medium can be provided which has a wide reproducing power margin, and which is able to prevent deterioration of characteristics due to repeated laser projection.
摘要翻译： 在基板上提供磁光存储介质，其具有第一磁性层，该第一磁性层在室温下显示出平面内的磁化强度和高于某一温度的垂直磁化强度;以及第二磁性层，其在 室温达到其居里温度。 第一磁性层由稀土金属和过渡金属的交替膜组成。 结果，可以提供具有宽的再现功率余量的磁光存储介质，并且能够防止由于重复的激光投影引起的特性的劣化。
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77.发明授权
公开(公告)号：US5629908A
公开(公告)日：1997-05-13
申请号：US536168
申请日：1995-09-29
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10586 , G11B11/10506 , G11B11/10515 , G11B11/10521 , G11B11/10595
摘要： A magneto-optical recording medium comprising a readout layer, an intermediate layer, and a recording layer. Two light beams having high and low light intensities respectively are applied while applying an external magnetic field. The magnetization direction of the recording layer is changed according to information, by reversing the sub-lattice magnetic moment of the readout layer in the case of the high light intensity. The intermediate layer exhibits a perpendicular magnetization during the irradiation, and also exhibits an in-plane magnetization at room temperature. Since it is not necessary to provide a device for generating a magnetic field for initializing every recording, it is possible to avoid increase in the size of the recording and reproducing apparatus. Moreover, the magnetization direction of the readout layer can be easily controlled with an external magnetic field, and the optical modulation overwriting property can be stabilized.
摘要翻译： 包括读出层，中间层和记录层的磁光记录介质。 在施加外部磁场的同时施加具有高和低光强度的两个光束。 在高光强度的情况下，通过反转读出层的亚晶格磁矩，根据信息改变记录层的磁化方向。 中间层在照射期间表现出垂直磁化，并且在室温下也表现出平面内的磁化强度。 由于不需要提供用于产生用于初始化每个记录的磁场的装置，因此可以避免记录和再现装置的尺寸的增加。 此外，可以通过外部磁场容易地控制读出层的磁化方向，并且可以稳定光学调制重写特性。
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公开(公告)号：US5939187A
公开(公告)日：1999-08-17
申请号：US859614
申请日：1997-05-20
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magneto-optical recording medium includes a reproducing layer which has in-plane magnetization at room temperature and has perpendicular magnetization at an elevated temperature of not less than a critical temperature, a recording layer made of a perpendicular magnetization film for recording information, an intermediate layer made of a non-magnetic film formed between the reproducing layer and the recording layer, and an in-plane magnetization layer adjacent to the reproducing layer, in which magnetization is reduced at a temperature in a vicinity of the critical temperature. According to the described magneto-optical recording medium, since information recorded in a recording magnetic domain of a portion having the in-plane magnetization is masked, even in the case where adjacent recording bits fall within a diameter of a spot of a converged light beam, each recording bit can be reproduced separately, thereby obtaining a quality reproduced signal.
摘要翻译： 磁光记录介质包括在室温下具有面内磁化并且在不低于临界温度的升高的温度下具有垂直磁化的再现层，由用于记录信息的垂直磁化膜制成的记录层，中间层 由形成在再现层和记录层之间的非磁性膜制成的层以及与再现层相邻的面内磁化层，其中磁化在临界温度附近的温度下降低。 根据所述的磁光记录介质，由于记录在具有面内磁化的部分的记录磁畴中的信息被掩蔽，所以即使在相邻记录位落入会聚光束的光点的直径的情况下 ，可以分别再现每个记录位，从而获得质量再现信号。
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公开(公告)号：US5889740A
公开(公告)日：1999-03-30
申请号：US957285
申请日：1997-10-24
申请人： Junichiro Nakayama , Go Mori , Naoyasu Iketani , Akira Takahashi
发明人： Junichiro Nakayama , Go Mori , Naoyasu Iketani , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10584 , G11B11/10521 , G11B11/10506 , G11B11/10515 , G11B11/10591
摘要： Featured is a magneto-optical recording medium including a first magnetic layer, a second magnetic layer, a third magnetic layer and a fourth magnetic layer formed one on another in this order. The first, second, third and fourth magnetic layers have Curie points Tc1, Tc2, Tc3 and Tc4, respectively, which satisfy the condition of Tc3
摘要翻译： 特征是包括依次形成在其上的第一磁性层，第二磁性层，第三磁性层和第四磁性层的磁光记录介质。 第一，第二，第三和第四磁性层分别具有满足Tc3
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80.发明授权
公开(公告)号：US5822282A
公开(公告)日：1998-10-13
申请号：US779774
申请日：1997-01-07
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10586 , G11B11/10521 , G11B11/10506
摘要： A magneto-optical recording medium has at least a substrate, a first magnetic layer, a second magnetic layer, and a first interface layer provided between the first and second magnetic layers. The first magnetic layer exhibits a perpendicular magnetic anisotropy from room temperature to a Curie temperature thereof. The second magnetic layer has a coercive force lower than A: that of the first magnetic layer at room temperature, has a Curie temperature higher than that of the first magnetic layer, and exhibits a perpendicular magnetic anisotropy from room temperature to a Curie temperature of the second magnetic layer. The first interface layer is made of at least one rare-earth metal and has a thickness of several atoms. With this arrangement, it is possible (1) to carry out light modulation overwriting with respect to the magneto-optical recording medium, (2) to carry out initialization without an initializing magnetic field, and (3) to stabilize recording bits.
摘要翻译： 磁光记录介质至少具有衬底，第一磁性层，第二磁性层和设置在第一和第二磁性层之间的第一界面层。 第一磁性层表现出从室温到其居里温度的垂直磁各向异性。 第二磁性层具有低于A的矫顽力：室温下的第一磁性层的矫顽力的居里温度高于第一磁性层的居里温度，并呈现出从室温到居里温度的垂直磁各向异性 第二磁性层。 第一界面层由至少一种稀土金属制成，具有几个原子的厚度。 通过这种布置，可以（1）对磁光记录介质进行光调制重写，（2）在不进行初始化磁场的情况下进行初始化，以及（3）稳定记录位。
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