Magneto-optic memory allowing direct overwrite of data

Details Magneto-optic memory allowing direct overwrite of data Magneto-optic memory allowing direct overwrite of data

1994-09-22

1995-10-31

Nelms, David C.

Static information storage and retrieval

Information masking

Polarization

369 13, 3692752, 360 59, G11C 1306, G11B 1304

Patent

active

054635780

ABSTRACT:
A magneto-optic memory and storage medium with the ability to directly write or overwrite ones and zeros at recording speed is described incorporating a radiant energy source, a control circuit for adjusting the power of the radiant energy beam and magneto-optic medium having a three layer sandwich comprising a magnetic bias layer, storage layer, and a switching layer therebetween functioning to switch from an antiferromagnetic state at low temperatures to a ferromagnetic state at temperatures above T.sub.AF. The invention overcomes the problem of direct overwrite of ones and zeros on magneto-optic media.

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