Patent ID: 6477120
Filing Date: 2002-11-05
Classification: G11B

Abstract:
A magneto-optical recording medium comprising:a reproducing layer whose magnetization direction is in-plane at room temperature and shifts to perpendicular at a predetermined temperature Ttrans and at temperatures above said predetermined temperature Ttrans; a recording layer whose magnetization direction is perpendicular in a range between room temperature and a Curie temperature thereof, during which said recording layer being magneto-statically coupled to said reproducing layer; and a magnetic mask layer which is provided between said reproducing layer and recording layer with an intermediate layer on said reproducing layer side, and whose magnetization direction is in-plane at room temperature, and wherein magnetization of said magnetic mask layer is reduced to 0 (zero) at Tm, wherein Tm is a predetermined temperature that is at least as high as Ttrans, said magnetic mask layer being made of alloy including at least one kind of light rare earth metals and at least one kind of 3d transition metals.