Magneto-optic recording structure and method

Details Magneto-optic recording structure and method Magneto-optic recording structure and method

1985-10-28

1987-09-15

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

360 16, 360 17, 360135, 369 13, 369 14, G11B 502, G11B 506, G11B 1100, G11B 1300

Patent

active

046943587

ABSTRACT:
A magnetic magneto-optic recording structure and method in which a magneto-optic active layer is positioned within the fringing magnetic field of a magnetic recording medium, the structure preferably being disk-shaped. The magneto-optic layer is irradiated by a continuous wave laser beam, by way of a transparent substrate thereon, to locally reduce the coercivity of the magneto-optic layer, so that the magneto-optic layer becomes locally magnetized to align itself with the fringing magnetic fields created by the magnetization pattern of information previously recorded on the magnetic recording layer. The information thus recorded on the magneto-optic layer can be read out with a laser beam of lesser power, employing the Kerr effect.

REFERENCES:
patent: 2950971 (1960-08-01), Lewin
patent: 3239841 (1966-03-01), Henkes, Jr.

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