Laser-Beam Recording on a Magnetic Film
- 1 March 1969
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 40 (3) , 972-973
- https://doi.org/10.1063/1.1657804
Abstract
A method of recording digital information on a thin magnetic film is described. The change of magnetization in the film is accomplished by a coincidence of a high-power optical beam from a laser and a magnetic field. Films having coercive force ratios Hc(25°C)/Hc(150°C) of at least 3 were used as the media. Information was recorded with a 1 W Argon-Ion laser beam controlled by an electrooptic switch to provide spots down to 3.5μ diam. Photographs and electrical readout of tracks of written bits are presented.This publication has 10 references indexed in Scilit:
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