Magneto-optical recording medium using in-plane magnetization fi

Details Magneto-optical recording medium using in-plane magnetization fi Magneto-optical recording medium using in-plane magnetization fi

1996-08-12

1999-03-09

Zimmerman, John J.

Stock material or miscellaneous articles

Composite

Of inorganic material

428694MM, 428694EC, 369 13, 369288, G11B 370, G11B 564, G11B 566

Patent

active

058798226

ABSTRACT:
A magneto-optical recording medium is constructed by a reproduction layer which assumes an in-plane magnetization state at room temperature and becomes a perpendicular magnetization film at temperatures between room temperature and a Curie temperature, a recording layer for storing information, and an intermediate layer which is arranged between the reproduction layer and the recording layer and in which a Curie temperature is lower than those of the reproduction layer and the recording layer and which is iron group element sub-lattice magnetization dominant. Each of the layers is constructed by a rare earth-iron group element amorphous alloy and the intermediate layer is made of a material, Co.sub.y).sub.100-x ! (8.ltoreq.x.ltoreq.15, 0.ltoreq.y.ltoreq.50). The reproduction layer has a compensation temperature between room temperature and the Curie temperature.

REFERENCES:
patent: 5563852 (1996-10-01), Murakami et al.
N. Nishimura, et al., "MSR Disks with Three Magnetic Layers Using In-Plane Magnetization Films", Journal of Magnetics Society of Japan, vol. 19, No. Suppl. S1., pp. 417-420, Sep. 27-29, 1994.
Tadashi Kobayashi, "The Study About Magnetism and Magnetoopic Effect of Rare Earth-iron Group Amorphous Alloy Thin Film and its Compound Film", doctoral thesis of Nagoya University, pp. 40-41, Mar. 1993.

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