Domain-wall-displacement-type magnetooptical recording medium
AssigneeCanon Kabushiki Kaisha
InventorsToshimori Miyakoshi, Yukari Aoki
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Abstract
A domain-wall-displacement-type magnetooptical recording medium is provided in which a floating magnetic field from a surrounding portion that operates on a recording/reproducing portion is suppressed. The recording medium includes a displacement layer having a composition such that rare-earth-element sub-lattice magnetization is dominant at room temperature, a switching layer, a memory layer, and a magnetization compensation layer in which iron-family-element sub-lattice magnetization is dominant at room temperature, for suppressing generation of a stray magnetic field at a temperature near room temperature.
Claims6
A domain-wall-displacement magnetooptical recording medium, comprising:
- a displacement layer in which domain walls are displaced and rare-earth-element sub-lattice magnetization is dominant at room temperature;
- a memory layer for holding recorded magnetic domains;
- a switching layer provided between said displacement layer and said memory layer that has a Curie temperature lower than Curie temperatures of said displacement layer and said memory layer;
- and
- a magnetization compensation layer having a composition such that iron-family-element sub-lattice magnetization is dominant at room temperature, whereby information is reproduced by magnifying the recorded magnetic domains transferred from said memory layer to said displacement layer, by displacing walls of the recorded magnetic domains.
Dependencies are inferred from the claim text.