Magneto-optical recording medium and method for reproducing sign

Details Magneto-optical recording medium and method for reproducing sign Magneto-optical recording medium and method for reproducing sign

1991-12-27

1993-06-08

Nguyen, Hoa T.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360 59, 360114, G11B 1304, G11B 1112, G11B 1110

Patent

active

052185818

ABSTRACT:
The present invention is intended to improve the track recording density and track density of a magneto-optic recording medium to prevent the deterioration of characteristics due to the variation of reproducing power. After recording information signals on a magneto-optic recording medium having at least a reproducing layer, an intermediate layer and a record hold layer, the direction of magnetization of the reproducing layer is turned in the direction of a initializing magnetic field. The reproducing layer is irradiated with a laser beam and a reproducing magnetic field is applied to the same simultaneously to heat the reproducing layer in a temperature distribution so that a region remaining in an initialized state, a region to which information signals are transferred and a region magnetized in the direction of the reproducing magnetic field are formed. Magnetic signals are read from the region of the reproducing layer to which information signals have been transferred.

REFERENCES:
patent: 5018119 (1991-05-01), Aratani et al.
patent: 5094925 (1992-03-01), Ise et al.

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