Overwritable magneto-optical recording medium having two-layer magnetic films wherein one of the films contains one or more of Cu, Ag, Ti, Mn, B, Pt, Si, Ge, Cr and Al, and a method of recording on the same

摘要

A magneto-optical recording medium having a first magnetic layer and a second magnetic layer having a higher curie point and a lower coercive force than those of the first magnetic layer, which magneto-optical recording medium satisfying a condition of <IMAGE> where HH is a coercive force of the first magnetic layer, HL is a coercive force of the second magnetic layer. Ms is a saturation magnetization of the second magnetic layer, h is a film thickness of the second magnetic layer, and sigma w is a magnetic wall energy between the first and second magnetic layers. The second magnetic layer contains an element which is not ferromagnetic at a room temperature. A magnetic field opposite in direction to the field of the first layer is applied to the second layer. A recording method is also present using such medium.