MANUFACTURE OF MAGNETO-OPTICAL THIN FILM

PURPOSE:To improve a reproduction SN ratio by a method wherein a heat treatment at the temperature in the neighborhood of Curie point is performed on the magneto-optical thin film provided on a substrate. CONSTITUTION:A GdTbTe thin film of 200Angstrom in thickness is provided on a glass substrate 1,...

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Bibliographische Detailangaben
Hauptverfasser:	MUTOU AKIRA, KUDOU YOSHIHIKO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CINEMATOGRAPHY ELECTRICITY ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY INDUCTANCES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MAGNETOGRAPHY MAGNETS PHOTOGRAPHY PHYSICS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TRANSFORMERS
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Beschreibung
Zusammenfassung:	PURPOSE:To improve a reproduction SN ratio by a method wherein a heat treatment at the temperature in the neighborhood of Curie point is performed on the magneto-optical thin film provided on a substrate. CONSTITUTION:A GdTbTe thin film of 200Angstrom in thickness is provided on a glass substrate 1, an Al thin film of 200Angstrom in thickness is formed thereon as a reflection film which performs an additional function as an oxidization-preventing film, and then a heat treatment is performed at 150 deg.C. The reproduction SN ratio can be improved by 5dB by performing a heat treatment for five hours or thereabout at the temperature in the neighborhood of Curie point.