Patent ID: 6707766
Filing Date: 2004-03-16
Classification: G11B

Abstract:
A magneto-optical recording medium formed of a film and having a plurality of information tracks, each information track comprising:in the following order, a substrate; an interference layer; a magnetic domain expansion layer; a first intermediate layer; a magnetic masking layer; a recording layer; and a protection layer, wherein the recording layer has a plurality of storage magnetic domains; the first intermediate layer cuts off exchange coupling with the recording layer when temperature rises past a predetermined temperature; the magnetic domain expansion layer has magnetic walls which move toward a higher temperature portion so as to form expanded magnetic domains when the first intermediate layer cuts off the exchange coupling with the recording layer; and the magnetic masking layer is located between the recording layer and the first intermediate layer, and is coupled with the recording layer through an exchange force at temperatures that are not higher than the predetermined temperature, and meanwhile cuts off magnetostatic coupling of the magnetic domain expansion layer with the recording layer at temperatures that are higher than the predetermined temperatures.