Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1993-12-17
1995-07-11
Epps, Georgia Y.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360 59, G11B 1304
Patent
active
054327610
ABSTRACT:
The invention provides a medium and a method suitable for magneto-optical and multiple recording.
The medium includes alternate thin layers of a magnetic rare-earth metal and an electrically conductive material, and has "magnetic frozen state" at low temperature. The medium may be magnetized to different ferromagnetic states when heated to different temperatures by a controlled laser beam, under an external magnetic field. The different magnetic states permit of multiple recording.
REFERENCES:
patent: 4576699 (1986-03-01), Sato et al.
patent: 4862437 (1989-08-01), Okada
patent: 4922454 (1990-05-01), Taki
Salamon et al., Phys. Rev. Lett. 56, 259 (1986).
Majkrzak et al., J. Appl. Phys. 63, 3447 (1988).
Dinh Tan
Epps Georgia Y.
Research Development Corp. of Japan
Sanyo Electric Co,. Ltd.
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