コバルト蒸着薄膜の磁気的,光学的性質

概要

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A hard magnetic thin cobalt film which is prepared as a recording medium is investigated to apply the magneto-optic effect to information readout system. In this paper Faraday effect is used. The magnetic properties of vacuum evoporated films, which are supposed to be inferior to the other films made by some other preparation techniques, have been improved by the oblique incidence of the vapor flux. Abrasion-proof of films with substrata, which is another highly deteriorative point, has been recovered by heating the substrata on evaporating. The resultant coercivity also remarkably increased, and it is unexpected result. The attenuation of transmitted light through the cobalt film has been compensated by about 30 per cent by evaporated coating of MgF₂. The Faraday rotation is about 3 degree, which is much larger than that of the data of electrodeposited films.
信州大学工学部の論文