Magnetooptical recording media and processes for production ther

Details Magnetooptical recording media and processes for production ther Magnetooptical recording media and processes for production ther

1990-05-01

1991-10-01

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Composite

Of inorganic material

428900, G11B 562, G11B 584

Patent

active

050532871

ABSTRACT:
Magnetooptical recording media according to the present invention are disclosed. By virtue of comprising films of Nd-Dy-Co, Nd-M-Fe or Nd-M-Fe-Co alloy system (in which M denotes Tb, Dy or Ho) having a magnetic easy axis perpendicular to the film, the present magnetooptical recording media have such advantages that there is not any fear of lowering magnetic properties owing to the oxidation of the alloy films, and that there is no need of heating substrates when said alloy films are intended to be formed on the substrates. Accordingly, these alloy films can be formed even on such substrates composed of organic materials such as plastics. Moreover, magnetooptical recording media which comprise the alloy films in accordance with the present invention have excellent magnetic properties such as perpendicular magnetic, anisotropic energy in direction normal to the film, coercive force and saturation magnetization, particularly in point of coercive force.

REFERENCES:
patent: 4612068 (1986-09-01), Tanaka
patent: 4695514 (1987-09-01), Takahashi et al.
patent: 4734344 (1988-03-01), Matsushima et al.
patent: 4814053 (1989-03-01), Shimokawato
patent: 4838962 (1989-06-01), Takayama et al.

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