Magneto-optical recording medium

Abstract

Abstract The magneto-optical recording medium is disclosed which has a laminous structure with a first magnetic film (11) suited to provide a large rotation angle of the plane of polarization by magneto-optical interaction, a third magnetic film(13) having a great corercive force, and a second magnetic film (12) interposed therebetween to magnetically couple the first and third magnetic films at room temperature, wherein such magnetic coupling is substantially interrupted at a temperature in a recording operation. Upon recording signal on the medium, a laser beam is irradiated to the medium and raise the temperature of the medium near Curie temperature Tc3 of the third magnetic film, thus direction of the magnetization is determined by the magnetic field applied to the irradiated portion. Upon cooling the irradiated portion, the second magnetic film serves to magnetically couple the first and third magnetic film, the magnetization of the third film is transferred to the first film. Thus the required magnetic field for recording is greatly reduced, and high C/N can be obtained resulting in high density recording.

Inventors

• 👤 Katsuhisa Aratani

Bibliographic Details