Patent ID: 6894954

Claim:
A domain wall displacement magneto-optical recording medium for irradiation with a light spot to form a temperature distribution therein which displaces domain walls and expands recorded domains for reproducing recorded information comprising: a domain wall displacement layer having a Curie temperature higher than a peak temperature for displacing said domain walls; a recording layer for storing information; and a switching layer arranged between said domain wall displacement layer and said recording layer and having a Curie temperature lower than those of the latter two layers, wherein said domain wall displacement layer has a smaller domain wall coercivity than said recording layer, wherein said domain wall displacement layer, said switching layer and said recording layer are coupled by exchange coupling such that the magnetization of said domain wall displacement layer corresponds to the magnetization of said recording layer at a temperature not higher than the Curie temperature of said switching layer and wherein when the domain wall displacement layer and the recording layer are coupled by exchange coupling at a temperature close to the Curie temperature of the switching layer, the saturation magnetization of said domain wall displacement layer is in opposite direction to the saturation magnetization of said recording and switching layers.