Information-carrying medium equipment for magneto-optic reading

Details Information-carrying medium equipment for magneto-optic reading Information-carrying medium equipment for magneto-optic reading

1988-05-20

1990-03-13

Stephan, Steven L.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360 59, 360131, 365122, G11B 1304, G11B 1112

Patent

active

049088092

ABSTRACT:
An information-carrying medium with first, second and third ferromagnetic layers is enclosed in a housing, in which an initializing magnet is disposed. The second layer of the information-carrying medium is magnetized by the initializing magnet premagnetized in a uniform direction and is used as a bias layer.

REFERENCES:
patent: 4612587 (1986-09-01), Kaneko et al.
patent: 4645722 (1987-02-01), Katayama et al.
patent: 4649519 (1987-03-01), Sun et al.
patent: 4701881 (1987-10-01), Tanaka et al.
patent: 4771347 (1988-09-01), Horimai et al.
patent: 4794560 (1988-12-01), Bell et al.
Kobayashi et al., "Magnetization Process of Exchange-Coupled Ferrimagnetic Double-Layered Films", Japanese Journal of Applied Physics, vol. 20, No. 11, Nov. 1981, pp. 2089-2095.
Cohen, C. L. "Magneto-Optic Memories Begin To Look Like A Good Bet", Electronics, vol. 60, No. 8, Apr. 16, 1987, p. 33.
"Single Beam Over Write Method Using Multilayered Magneto Optical Media," 28p-ZL-3, Extended Abstracts (The 34th Spring Meeting 1987); The Japan Society of Applied Physics and Related Societies; 3-28-87.

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