| 摘要 |
PROBLEM TO BE SOLVED: To provide the magneto-optical recording medium of a DWDD reproducing system in which a magnetic domain wall is stably moved and cross light is prevented while adopting land/groove recording in order to make a track pitch narrow. SOLUTION: A magneto-optical recording medium 10 is a magnetic domain wall movable magneto-optical recording medium provided with a magnetic layer 16 where a magnetic domain wall movable reproducing layer, a switching layer, and a recording holding layer are multiply layered, and both a land 11 and a groove 12 are used as recording/reproducing tracks but magnetism is changed by irradiating a side wall portion 13 located between the land 11 and the groove 12 with a light beam 21 in advance to magnetically part a space between the land 11 and the groove 12. Further, a step between the land 11 and the groove 12 is made shallower than the conventional magneto-optical recording medium for land/groove recording by making the step into 1/32 to 1/8 of the wavelength of a light source to be used for recording/reproducing and by making the inclination angle of the side wall portion into 20°to 60°. COPYRIGHT: (C)2004,JPO
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