Magnetic head made from amorphous magnetic film
    51.
    发明授权
    Magnetic head made from amorphous magnetic film 失效
    磁头由非晶磁性膜制成

    公开(公告)号:US4766039A

    公开(公告)日:1988-08-23

    申请号:US875222

    申请日:1986-06-17

    摘要: A magnetic head comprising a magnetic film in at least a part of a magnetic circuit, at least a part of the magnetic film being formed in contact with, or being exposed to, an oxide or oxygen at least in a heating step at 150.degree. C. or higher in a process for preparing the magnetic head is disclosed. An amorphous alloy film for the magnetic film has the following composition formula to give distinguished head characteristics without any oxidation:Co.sub.a T.sub.b Zr.sub.c N.sub.dwhere T is at last one of Nb, Ta, W, Mo, V and Cr; N is at least one of Au, Pt and Ag; d.gtoreq.1, b>0, b.sub.1 +b.sub.2 +2c.gtoreq.10, a+d.gtoreq.80, -1.ltoreq.(3c-b.sub.1 -3b.sub.2 -5b.sub.3 -3b.sub.4 -4d)/(c+b.sub.1 +b.sub.2 +b.sub.3 +b.sub.4 +d).ltoreq.1, and a+b+c+d=100, where b.sub.1 is a Nb concentration, b.sub.2 is a Ta concentration, b.sub.3 is a W concentration, b.sub.4 is sum total of Mo, Cr and V concentrations and b=b.sub.1 +b.sub.2 +b.sub.3 +b.sub.4.

    摘要翻译: 磁头包括至少一部分磁路中的磁性膜,至少一部分磁性薄膜至少在150℃的加热步骤中与氧化物或氧气接触或暴露于氧化物或氧气中 公开了一种用于制备磁头的方法。 用于磁性膜的非晶态合金膜具有以下组成式,可以得到无特殊的头部特性:没有任何氧化:CoaTbZrcNd,其中T是Nb,Ta,W,Mo,V和Cr中的最后一个; N是Au,Pt和Ag中的至少一种; d> / = 1,b> 0,b1 + b2 + 2c> / = 10,a + d> / = 80,-1(3c-b1-3b2-5b3-3b4-4d)/(c + b1 + b2 + b3 + b4 + d)

    Double-layered magnetooptical recording medium
    52.
    发明授权
    Double-layered magnetooptical recording medium 失效
    双层磁光记录介质

    公开(公告)号:US4753853A

    公开(公告)日:1988-06-28

    申请号:US716210

    申请日:1985-03-26

    摘要: A double-layered magnetooptical recording medium consists of two exchange-coupled layers that permit perpendicular magnetization, one layer having a low Curie point and a high coercive force and the other layer having a high Curie point and a low coercive force. The layer having low coercive force is made of a transition metal rich amporphous Gd.sub.U (Fe.sub.V Co.sub.100-V).sub.100-U alloy having the following compositional range, and the layer having high coercive force is made of a transition metal rich amorphous Tb.sub.W Fe.sub.100-W alloy having the following compositional range:U=20-26 atomic %,V=50-80 atomic %, andW=27-33 atomic %.

    摘要翻译: 双层磁光记录介质由允许垂直磁化的两个交换耦合层组成,一层具有低居里点和高矫顽力,另一层具有高居里点和低矫顽力。 具有低矫顽力的层由具有以下组成范围的富金属过渡金属富集的GdU(FeVCo100-V)100-U合金制成,并且具有高矫顽力的层由富含过渡金属的无定形TbWFe100-W合金制成,其具有 以下组成范围:U = 20-26原子%,V = 50-80原子%,W = 27-33原子%。

    Magneto-optical recording medium
    55.
    发明授权
    Magneto-optical recording medium 失效
    磁光记录介质

    公开(公告)号:US4631617A

    公开(公告)日:1986-12-23

    申请号:US509189

    申请日:1983-06-29

    摘要: A magneto-optical recording medium, in which a transparent synthetic resin substance, a light transparent thin film of a simple substance of metal or a metal compound, a dielectric layer, a recording medium layer formed of an amorphous alloy having an easy axis of magnetization in a direction perpendicular to the layer surface and thick enough to reflect light, and a protective film are provided in this order from the light incidence side. The dielectric layer may be provided with an auxiliary recording medium layer formed of the amorphous alloy having an easy axis of magnetization in the direction perpendicular to the layer surface and thin enough to permit the passage therethrough of light.

    摘要翻译: 一种磁光记录介质,其中透明合成树脂物质,金属或金属化合物的透明薄膜,电介质层,由具有易磁化轴的非晶合金形成的记录介质层 在垂直于层表面的方向上并且足够厚以反射光,并且从光入射侧依次提供保护膜。 电介质层可以设置有由非晶合金形成的辅助记录介质层,该非晶合金在垂直于层表面的方向上具有容易的磁化轴,并且足够薄以允许光通过。

    Magnetooptic memory medium
    59.
    发明授权
    Magnetooptic memory medium 失效
    磁光记忆介质

    公开(公告)号:US4467383A

    公开(公告)日:1984-08-21

    申请号:US237083

    申请日:1981-02-23

    摘要: Disclosed is a new magnetic storage medium including a layer of amorphous material typically GdDyFe whose Curie recording point (e.g. 120.degree. C.) is lower than its crystallization point (e.g. 350.degree. C.) to enable crystallization to cause variations in its optical properties such as transmittance or reflectivity for thermomagnetic writing. Reversible recordings are set up on the amorphous material layer by a thermomagnetic writing technique, for example Curie point writing, while unchangeable or permanent recordings are set up on the amorphous material layer through laser-activated crystallization of the amorphous material layer.

    摘要翻译: 公开了一种新的磁存储介质,其包括通常具有居里记录点(例如120℃)低于其结晶点(例如350℃)的GdDyFe的非晶材料层,以使结晶能够引起其光学性质的变化,例如 作为热磁写入的透射率或反射率。 通过热磁写入技术(例如居里点写入)在非晶材料层上设置可逆记录,而通过非晶材料层的激光激活结晶,在非晶材料层上建立不变的或永久的记录。

    Magneto-optical memory element
    60.
    发明授权
    Magneto-optical memory element 失效
    磁光存储元件

    公开(公告)号:US4464437A

    公开(公告)日:1984-08-07

    申请号:US132747

    申请日:1980-03-24

    摘要: A magneto-optic memory element consisting of a substrate provided with an amorphous layer of an alloy of a rare-earth metal and a transition metal. The layer has a uniaxial magnetic anisotropy. Such memory elements are suitable for storing digital information in the form of magnetized areas, the magnetizaiton direction of which can be read by means of the Kerr effect or Faraday effect. By adding bismuth to the alloy, the Kerr rotation and Faraday rotation can each be increased considerably, so that simpler reading of the stored information is possible.

    摘要翻译: 一种磁光存储元件,由具有稀土金属和过渡金属的合金的非晶层的基板组成。 该层具有单轴磁各向异性。 这种存储元件适用于以磁化区域的形式存储数字信息,其磁化方向可通过克尔效应或法拉第效应来读取。 通过向合金中添加铋,克尔旋转和法拉第旋转可以大大增加,从而可以更简单地读取所存储的信息。