G - Physics – 11 – B
Patent
G - Physics
11
B
352/31, 117/24.2
G11B 13/04 (2006.01) G11B 5/66 (2006.01) G11B 11/10 (2006.01) G11B 11/105 (2006.01)
Patent
CA 1314768
ABSTRACT OF THE DISCLOSURE Disclosed is herein a magneto-optical recording medium comprising a first ferrimagnetic layer formed of rare earth metal element and transition metal element, having magnetization perpendicular to a surface of the first ferrimagnetic layer derived by excess magnetization of the rare earth metal element to the transition metal element, and having no compensation temperature upon room temperature; and a second ferrimagnetic layer formed of rare earth metal element and transition metal element, having magnetization perpendicular to a surface of the second ferrimagnetic layer derived by excess magnetization of the transition metal element, and having no compensation temperature upon room temperature, the first and second ferrimagnetic layers being superposed with each other and coupled with exchange interaction, the magnetization of the first ferrimagnetic layer and the magnetization of the second ferrimagnetic layer being arranged to opposite direction with each other at a temperature between room temperature and recording temperature around Curie temperature of at least one of the ferrimagnetic layers.
523928
Aoki Yoshio
Horimai Hideyoshi
Watanabe Kenjiro
Gowling Lafleur Henderson Llp
Sony Corporation
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