Optical magnetic recording medium and optical magnetic reproduci

Details Optical magnetic recording medium and optical magnetic reproduci Optical magnetic recording medium and optical magnetic reproduci

1997-02-07

1999-06-01

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

428694ML, G11B 1100

Patent

active

059094109

ABSTRACT:
An optical magnetic recording medium includes a first magnetic film for holding information in a status of either an upward or a downward magnetization, a second magnetic film closely adjacent to the first magnetic film and an in-plane magnetization film positioned between the first and second magnetic films, the in-plane magnetization film having such a characteristic that its magnetic characteristics are switched between a first temperature range and a second temperature range. The in-plane magnetization film is kept within the first temperature range at a room temperature and, at the time of an information reproduction, the in-plane magnetization film is locally heated to the second temperature range by an irradiation of an energy beam so that information on the recording layer is copied to the reproduction layer, and the copied information is observed.

REFERENCES:
patent: 5502692 (1996-03-01), Osato
patent: 5615180 (1997-03-01), Mieda et al.
patent: 5640374 (1997-06-01), Hirokane et al.
N. Nishimura et al, "Magneto-Static Coupling MSR with In-Plane Magnetization Films", International Symposium On Optical Memory 1995, Technical Digest, pp. 27-28.

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