Patent ID: 6632546
Filing Date: 2003-10-14
Classification: G11B,Y10S,Y10T

Abstract:
A magneto-optical recording medium, comprising:a read layer maintaining an in-plane magnetization state predominantly characterized by in-plane magnetic anisotropy at room temperature and changing to a vertical magnetization state predominantly characterized by vertical magnetic anisotropy as temperature rises; a recording layer for recording and storing information; and a non-magnetic film sandwiched between said read layer and said recording layer for preventing exchange coupling between said read layer and said recording layer; wherein, said recording layer comprises a first layer and a second layer with different compositions from each other, said first layer is made from a recording material that exhibits magnetization in a first direction in the presence of saturation magnetization and sublattice magnetization, and said second layer is made from a recording material that exhibits magnetization in a second direction different than the first direction in the presence of saturation magnetization and sublattice magnetization at room temperature exhibits magnetization in said first direction in the presence of saturation magnetization and sublattice magnetization at around a read temperature at which said read layer changes from an in-plane magnetization state to a vertical magnetization state.