Magneto-optical recording medium having two magnetic layers with perpendicular magnetic anisotropy, and information recording method having the same

摘要

A magneto-optical recording medium and an information recording method using the medium in which over-write is performed by magnetic field modulation. The magneto-optical recording medium includes a second magnetic layer (initializing layer) consisting of a magnetic layer, which is magnetized in advance in one direction, has a high Curie temperature, does not lose magnetization in a recording/erasing mode, and has a perpendicular magnetic anisotropy, and a first magnetic layer (recording layer) having a perpendicular magnetic anisotropy and exchange- coupled to the second magnetic layer. The data transfer speed in an over- write operation is remarkably increased when recording is performed by turning on/off an external magnetic field in accordance with information while radiating a lazer beam using the magnetooptical recording medium.