MAGNETO-OPTICAL RECORDING MEDIUM AND MAGNETO-OPTICAL STORAGE DEVICE

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A magneto-optical recording medium comprising a substrate, a first recording layer mainly consisting of Tb and FeCo deposited on the substrate, dominant in compensation composition or transition metal at room temperature, and exhibiting perpendicular magnetization, and a second recording layer provided on the first recording layer, having compensation temperature of at least 100 °C, dominant in rare earth element at room temperature, and exhibiting perpendicular magnetization. Inequalities 60 °C Hc2·t2 are preferably satisfied, where Tc1 and Tc2 are Curie temperature of the first and second recording layers, Hc1 and Hc2 are the coercive force at room temperature, and t1 and t2 are film thickness. © KIPO & WIPO 2007