Magneto-optical recording medium

Abstract

PURPOSE: To obtain a magneto-optical recording medium having a satisfactory reproduction S/N by providing a chalcogenite film on a substrate as an optical guide. CONSTITUTION: A chalcogenite film 9 and a magneto-optical magnetic film 10 are laminated on a substrate 8, the refractive index N1 of the film 9 shows N1+ to the right-turn circular polarized light and N1- to the left-turn circular polarized light respectively. In the same way, the refractive index N2 of the film 10 has two types of indexes N2+, N2-. The area of refractive indexes (N1+, N1-) and the area of (N'1+, N'1-) are arranged alternately on the same plane containing a large difference between the reflection factor R and the Kerr rotational angle θ k . Thus either one of these two areas can be used as an optical guide. In other words, the optical guide is set at the area of (N1+, N1-), for example, for follow-up of tracks. As a result, the stable recording/ reproducing and erasing jobs are ensured with no increase of reproduction noises produced by follow-up of tracks with use of a geometrical groove. COPYRIGHT: (C)1988,JPO&Japio

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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    JP-2010127364-AJune 10, 2010Honda Motor Co Ltd, 本田技研工業株式会社自動二輪車
    JP-H03252937-ANovember 12, 1991Sharp CorpMagneto-optical recording medium
    US-8813606-B2August 26, 2014Toyota Jidosha Kabushiki Kaisha, Aisin Aw Co., Ltd.Transmission