Patent ID: 6226234
Filing Date: 2001-05-01
Classification: G11B

Abstract:
A magneto-optical recording medium having a magneto-optical recording film, an auxiliary magnetic film and a nonmagnetic film between the auxiliary magnetic film and the magneto-optical recording film wherein a reproduction signal is reproduced by magnetically transferring a recorded magnetic domain of the magneto-optical recording film to the auxiliary magnetic film upon irradiation with reproducing light characterized in that:the auxiliary magnetic film is a magnetic film of at least one layer which transforms from a plane-magnetized film into a perpendicular-magnetized film when exceeding a critical temperature,the magneto-optical recording film is a perpendicular-magnetized film at a temperature not lower than room temperature, and the magneto-optical recording film and the auxiliary magnetic film satisfy the following relationship:i) room temperature <T.sub.CR <T.sub.COMP <T.sub.Cii) T.sub.CR <T.sub.C0,wherein the Curie temperature, critical temperature and compensation temperature of the auxiliary magnetic film are designated as T.sub.C, T.sub.CR, and T.sub.COMP, respectively, and the Curie temperature of the magneto-optical recording film is designated as T.sub.C0,whereby a larger magnetic domain than the recorded magnetic domain of the magneto-optical recording film is transferred to the auxiliary magnetic film at the time of reproduction by virtue of the magnetic characteristics of the auxiliary magnetic film.