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公开(公告)号：US4695514A
公开(公告)日：1987-09-22
申请号：US675850
申请日：1984-11-28
CPC分类号： G11B11/10591 , G11B11/10586 , Y10S428/90 , Y10T428/31678
摘要： A magneto-optical memory element includes a glass substrate and an amorphous Nd-Gd-Fe ternary alloy magnetic recording thin-film having an axis of easy magnetization perpendicular to its surface. The magneto-optical memory element shows a preferable coercive force, a high Kerr rotation angle in the reproduced laser beam, and the Curie temperature suited for a stable operation.
摘要翻译： 磁光存储元件包括玻璃基板和具有垂直于其表面的易磁化轴的非晶Nd-Gd-Fe三元合金磁记录薄膜。 磁光存储元件显示出优选的矫顽力，再现激光束中的高克尔旋转角以及适于稳定操作的居里温度。
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公开(公告)号：US4610912A
公开(公告)日：1986-09-09
申请号：US648741
申请日：1984-09-10
申请人： Akira Takahashi , Yoshiteru Murakami , Junji Hirokane , Hiroyuki Katayama , Kenji Ohta , Hideyoshi Yamaoka
发明人： Akira Takahashi , Yoshiteru Murakami , Junji Hirokane , Hiroyuki Katayama , Kenji Ohta , Hideyoshi Yamaoka
IPC分类号： G11B11/105 , H01F10/12 , H01F10/14 , G11B7/24
CPC分类号： G11B11/10593 , H01F10/126 , H01F10/14 , Y10S428/90 , Y10T428/2495 , Y10T428/24975
摘要： A magneto-optic memory element includes a transparent substrate, a first transparent nitride film, a GdTbFe recording layer, a second transparent nitride film, and a reflection film formed in this order. The first transparent nitride film has an index of refraction higher than that of the second transparent nitride film. In a preferred form, the first transparent nitride film is a SiN film having the index of refraction of about 2.0, and the second transparent nitride film is an AlN film having the index of refraction of about 1.8 to 1.9.
摘要翻译： 磁光存储元件包括透明衬底，第一透明氮化物膜，GdTbFe记录层，第二透明氮化物膜和依次形成的反射膜。 第一透明氮化物膜的折射率高于第二透明氮化物膜的折射率。 在优选形式中，第一透明氮化物膜是折射率为约2.0的SiN膜，第二透明氮化物膜是折射率为约1.8至1.9的AlN膜。
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公开(公告)号：US5719831A
公开(公告)日：1998-02-17
申请号：US768794
申请日：1996-12-18
IPC分类号： G11B11/10 , G11B11/105 , G11B23/03 , G11B11/00
CPC分类号： G11B23/0321 , G11B11/10552 , G11B23/03
摘要： A magneto-optical disk cartridge includes a magnet which is magnetized substantially parallel to a surface of a magneto-optical disk for generating an initializing magnetic field. This structure permits a reduction in the thickness of the magneto-optical disk cartridge.
摘要翻译： 磁光盘盒包括磁体，该磁体基本上平行于磁光盘的表面而被磁化，用于产生初始化磁场。 这种结构允许减小磁光盘盒的厚度。
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公开(公告)号：USRE35629E
公开(公告)日：1997-10-14
申请号：US136019
申请日：1993-10-14
申请人： Yoshiteru Murakami , Akira Takahashi , Kazuo Van , Junichiro Nakayama , Hiroyuki Katayama , Kenji Ohta
发明人： Yoshiteru Murakami , Akira Takahashi , Kazuo Van , Junichiro Nakayama , Hiroyuki Katayama , Kenji Ohta
IPC分类号： G11B11/10 , G11B11/105 , G11B7/24
CPC分类号： G11B11/10584 , G11B11/10586
摘要： A magneto-optical memory element has a multi-layer construction in the order from a side first receiving light from a light-source which includes a first transparent dielectric film, a rare earth transition metal alloy film, a second transparent dielectric film and a reflective film. The magneto-optical device uses circular dichroism effect of a magnetic mater for reading information. The rare earth transition metal alloy film has a refractive index represented by n.+-..DELTA.n wherein n=3.2-3.55i and .DELTA.n=0.05-0.03i. The thickness of film is about 18 to 46 nm. The second transparent dielectric film has a refractive index of 2.0.+-.0.2 and a film thickness of 80 to 108 nm.
摘要翻译： 磁光存储元件具有从第一次接收来自光源的一侧的顺序的多层结构，该光源包括第一透明电介质膜，稀土过渡金属合金膜，第二透明电介质膜和反射 电影。 磁光装置使用磁性体的圆二色性来读取信息。 稀土过渡金属合金膜的折射率为n +/- DELTA n，n = 3.2-3.55i，DELTA n = 0.05-0.03i。 膜的厚度为约18至46nm。 第二透明电介质膜的折射率为2.0 +/- 0.2，膜厚为80〜108nm。
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公开(公告)号：US5665467A
公开(公告)日：1997-09-09
申请号：US196978
申请日：1994-02-15
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 first magnetic layer, a second magnetic layer and a third magnetic layer respectively made of rare-earth-transition metal alloys which are laminated in this order. The first magnetic layer has a perpendicular magnetization in a temperature range between room temperature and its Curie temperature. The second magnetic layer made of GdFeCo is set such that its Curie temperature is higher than the Curie temperature of the first magnetic layer, coercive force thereof at room temperature is nearly zero, and that it has an in-plane magnetization at room temperature and a transition occurs therein from the in-plane magnetization to the perpendicular magnetization at above a predetermined temperature. The third magnetic layer is set such that it has a perpendicular magnetization in a temperature range of room temperature and its Curie temperature, its Curie temperature is higher than the Curie temperature of the first magnetic layer, and coercive force thereof at room temperature is smaller than the coercive force of the first magnetic layer.
摘要翻译： 磁光记录介质包括依次层叠的分别由稀土 - 过渡金属合金制成的第一磁性层，第二磁性层和第三磁性层。 第一磁性层在室温和居里温度之间的温度范围内具有垂直磁化强度。 由GdFeCo制成的第二磁性层的居里温度设定为高于第一磁性层的居里温度，室温下的矫顽力接近零，在室温下具有面内磁化强度， 在从预定温度以上的面内磁化强度向垂直磁化发生。 第三磁性层被设定为使其在室温的温度范围内具有垂直磁化强度和居里温度，居里温度高于第一磁性层的居里温度，室温下的矫顽力小于 第一磁性层的矫顽力。
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56.发明授权
公开(公告)号：US5615180A
公开(公告)日：1997-03-25
申请号：US198620
申请日：1994-02-18
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10586 , G11B11/10534 , G11B11/10506 , G11B11/10519 , G11B11/10523
摘要： A magneto-optical disk is provided with a recording layer that exhibits perpendicular magnetization, an intermediate layer wherein in-plane magnetization occurs at room temperature and a transition from the in-plane magnetization to perpendicular magnetization occurs as the temperature thereof rises, and an auxiliary layer that is made of a rare-earth-transition-metal alloy and that exhibits perpendicular magnetization, and these layers are laminated in this order. The composition of the rare-earth-transition-metal alloy is set so that the magnetic moment of the rare-earth metal is relatively greater than that of the transition metal at room temperature and the compensation temperature is located between room temperature and the Curie temperature T.sub.c3. A magneto-optical recording apparatus for rewriting information on the magneto-optical disk is provided with a single magnet for applying H.sub.w onto a portion on the magneto-optical disk irradiated by a light beam, as well as for applying H.sub.init having a greater intensity than H.sub.w onto a portion that is apart from the portion irradiated by the light beam. This arrangement makes it possible to achieve a more compact, thinner magneto-optical recording apparatus which allows light-modulation overwriting.
摘要翻译： 磁光盘设置有表现出垂直磁化的记录层，其中在室温下发生面内磁化的中间层，并且随着其温度升高而发生从平面内磁化到垂直磁化的转变，辅助 层，其由稀土 - 过渡金属合金制成并且呈现垂直磁化，并且这些层依次层压。 设定稀土 - 过渡金属合金的组成使得稀土金属的磁矩在室温下比过渡金属的磁矩更大，并且补偿温度位于室温和居里温度之间 Tc3。 用于在磁光盘上重写信息的磁光记录装置设置有用于将Hw施加到由光束照射的磁光盘上的部分上的单个磁体，以及用于施加具有比光束更大的强度的Hinit Hw到与光束照射的部分分开的部分。 这种布置使得可以实现允许光调制重写的更紧凑，更薄的磁光记录装置。
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57.发明授权Optical/magnetic composite head having magnetic and optical heads in one integrated unit 失效在一个集成单元中具有磁性和光学头的光学/磁性复合头
公开(公告)号：US5193082A
公开(公告)日：1993-03-09
申请号：US502104
申请日：1990-03-29
CPC分类号： G11B7/1353 , G11B11/10532 , G11B11/10536 , G11B11/10554 , G11B7/124 , G11B11/1058 , G11B2007/13722
摘要： A photomagnetic composite head comprising a magnetic head and an optical head that are integrated into one unit, an optical waveguide path of the optical head being located in the surface of the magnetic head that faces a recording medium, and a laser beam that passes through the optical waveguide path being irradiated on a point on the recording medium where a magnetic field is impressed from the magnetic head, whereby recording can be performed under a condition in which the coercivity of the recording medium has been lowered by the laser beam, thus making it possible to achieve high density recording by using a recording medium with a high coercivity.
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58.发明授权
公开(公告)号：US5053611A
公开(公告)日：1991-10-01
申请号：US287053
申请日：1988-12-21
申请人： Akira Takahashi , Yoshiteru Murakami , Junichiro Nakayama , Kenji Ohta , Hiroyuki Katayama , Michinobu Mieda
发明人： Akira Takahashi , Yoshiteru Murakami , Junichiro Nakayama , Kenji Ohta , Hiroyuki Katayama , Michinobu Mieda
IPC分类号： G11B11/10 , G11B7/0033 , G11B11/105 , G11B17/34
CPC分类号： G11B11/10565 , G11B11/10556 , G11B11/1056 , G11B11/10563 , G11B17/34 , G11B7/0033
摘要： A recording and reproducing device for a magneto-optical card includes an optical head for irradiating a magneto-optical recording medium of a magneto-optical card placed into the device with a laser beam. A magnetic field generator applies a biased magnetic field to the magneto-optical recording medium, and an optical system manipulating mechanism for the optical system of the above-mentioned optical head varies the spot irradiated by the laser beam. The optical head is fixed to the main frame of the device. The magneto-optical card is also supported where it is irradiated by the laser beam emitted from the optical head. The magneto-optical card is moved in a plane parallel to the surface of the magneto-optical card for rough searching and then a part of or the whole magnetic field generator is moved to come into contact with the magneto-optical card to stop the vibration of the magneto-optical card. The spot to be irradiated by the laser beam is then varied by means of the optical system of the optical head.
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公开(公告)号：US6001467A
公开(公告)日：1999-12-14
申请号：US13987
申请日：1993-02-05
IPC分类号： G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , G11B11/10584 , Y10S428/90 , Y10T428/265
摘要： A magneto-optic memory medium comprising a dielectric film, a magneto-optic memory film, a dielectric film and a reflective film superposed in layers on a light trnasmitting substrate, the magneto-optic memory film being a rare earth-transition metal alloy film having the composition formula of:(Gd.sub.x Tb.sub.1-x).sub.y Fe.sub.1-ywherein x is 0.58 to 0.62, and y is 0.27 to 0.33, which is useful as a magneto-optic disc or magneto-optic card.
摘要翻译： 一种磁光存储介质，包括介电膜，磁光存储膜，电介质膜和叠层在光透射基底上的反射膜，所述磁光存储膜是稀土过渡金属合金膜，其具有 （GdxTb1-x）yFe1-y的组成式：x为0.58〜0.62，y为0.27〜0.33，可用作磁光盘或磁光卡。
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公开(公告)号：US5305254A
公开(公告)日：1994-04-19
申请号：US993517
申请日：1992-12-17
申请人： Yoshiteru Murakami , Junichiro Nakayama , Ichiro Hiramatsu , Akira Takahashi , Kenji Ohta , Kazuo Van , Hiroyuki Katayama
发明人： Yoshiteru Murakami , Junichiro Nakayama , Ichiro Hiramatsu , Akira Takahashi , Kenji Ohta , Kazuo Van , Hiroyuki Katayama
IPC分类号： G11B5/64 , G11B11/105 , G11C13/04
CPC分类号： G11B5/64 , G11B11/10582
摘要： A magneto-optic memory device, such as a magneto-optic disk or magneto-optic card having a pair of opposed substrates at least one of which is transparent. Between the substrates is a magneto-optic memory layer made of a stack of dielectric film, a rear earth-transition metal alloy thin film, a dielectric film and a light reflecting film built on the surface of the transparent substrate opposed to the other substrate. An adhesive layer covers the memory layer and bonds the transparent substrate to the other substrate. Lastly, a metal nitride film interposed between the light reflecting film of the memory layer and the adhesive layer.
摘要翻译： 磁光存储器件，例如磁光盘或磁光卡，其具有一对相对的衬底，其中至少一个是透明的。 在基板之间是由与介质膜叠层构成的磁光存储层，后置接地 - 过渡金属合金薄膜，电介质膜和反射膜构成在与其他基板相对的透明基板的表面上。 粘合剂层覆盖存储层并将透明基底粘合到另一个基底上。 最后，介于存储层的光反射膜和粘合剂层之间的金属氮化物膜。
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