Domain wall displacement magneto-optic recording medium, reproducing method and apparatus for the same

摘要

A magneto-optic recording medium in which information is reproduced while a recording magnetic domain is enlarged by displacing a domain wall based on a temperature distribution formed by a beam of light and having a maximum temperature Tr. The recording medium comprises a reproducing layer (1) in which a domain wall is displaced, a recording layer (3) for holding a recording magnetic domain corresponding to information, and a cutoff layer (2) disposed between the reproducing layer and the recording layer and having a Curie temperature lower than those of the reproducing layer and recording layer. The recording medium satisfies the following condition;(Tr - RT) / (Tc2 - RT) ≥ 1.8 whereTc2 : Curie temperature of the cutoff layer, andRT : room temperature.