Magneto-optical recording material

Details Magneto-optical recording material Magneto-optical recording material

1988-01-19

1989-11-14

Lesmes, George F.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

427132, 428694, 428900, 428928, G11B 724

Patent

active

048806943

ABSTRACT:
Disclosed is a magneto-optical recording material whose composition formula is indicated by (Co.sub.1-a M.sub.a).sub.100-y R.sub.y where M denotes at least one element selected from the group consisting of elements of the platinum group and Fe, Ni, Nb, Cu, Ag, Al, B, Si and Ge; R denotes either at least two elements selected from the group consisting of Tb, Sm, Gd, Dy, Ho and Y or a single element selected from the group consisting of Tb, Gd, Dy and Ho; the value a satisfies 0<a.ltoreq.0.5, while the value y satisfies 14.ltoreq.y.ltoreq.36 in terms of atomic percent; the material being substantially amorphous. A perpendicularly magnetized amorphous film made of this material is excellent in thermal stability, corrosion resistance etc., and affords a greater read output-to-noise ratio (C/N).

REFERENCES:
patent: 4497870 (1985-02-01), Kudo et al.
patent: 4670353 (1987-06-01), Sakurai
patent: 4734334 (1988-03-01), Matsushima et al.
Aratoni et al., J. Appl. Phys., 57(1), p. 3903, Apr. 15, 1985.

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