Super-resolution magneto-optic recording medium using in-plane m

Details Super-resolution magneto-optic recording medium using in-plane m Super-resolution magneto-optic recording medium using in-plane m

1995-09-28

1999-08-10

Kiliman, Leszek

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Physical dimension specified

428336, 428694ML, 428694MM, 428694SC, 428694RL, 428694T, 428900, 369 13, G11B 566

Patent

active

059357010

ABSTRACT:
A magneto-optic recording medium of the present invention has a transparent substrate. A reproducing layer is stacked on the substrate, and remains in an in-plane magnetic state at room temperature and is transformed into a perpendicular magnetic state at an increased temperature. A first recording layer for storing information therein is stacked on the reproducing layer. In the first recording layer, the perpendicular magnetic state is maintained in a temperature range of from room temperature to the Curie temperature. A second recording layer for storing information therein is stacked on the first recording layer. In the second recording layer, the perpendicular magnetic state is maintained in a temperature range of from room temperature to the Curie temperature. The sub-lattice magnetic moment of an element forming the second recording layer is oriented in the direction opposite to the magnetic moment of the first recording layer. A same type of elements being used for the first and second recording layers. The rotation of the plane of polarization of incident light generated in the reproducing layer at a magnetic wall domain is canceled by the rotation angles of the planes of polarization of the incident light generated in the first and second recording layers.

REFERENCES:
patent: 5094925 (1992-03-01), Ise et al.
patent: 5248565 (1993-09-01), Tsutsumi et al.
patent: 5428585 (1995-06-01), Hirokane et al.
patent: 5452272 (1995-09-01), Murakami et al.
patent: 5488604 (1996-01-01), Negishi
Patent Abstracts of Japan, vol. 016, No. 243, published Jun. 4, 1992 English Abstract of Japanese Patent No. 4-053047.
Patent Abstracts of Japan, vol. 017, No. 141, published Mar. 23, 1993, English Abstract of Japanese Patent No. 4-313833.
Patent Abstract of Japan, vol. 18, No. 184, published Mar. 29, 1994, Englishe Abstract of Japanese Patent No. 5-342677.

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