发明授权
- 专利标题: Magneto-optical recording medium
- 专利标题(中): 磁光记录介质
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申请号: US08160976申请日: 1993-11-30
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公开(公告)号: US06399227B1公开(公告)日: 2002-06-04
- 发明人: Yoshihiko Kudoh , Yasumori Hino , Yuuichi Fukamachi , Masahiro Birukawa
- 申请人: Yoshihiko Kudoh , Yasumori Hino , Yuuichi Fukamachi , Masahiro Birukawa
- 优先权: JP4-321613 19921201
- 主分类号: B32B1518
- IPC分类号: B32B1518
摘要:
A magneto-optical recording medium including a recording layer for recording information and a substrate for supporting the recording layer is disclosed. The recording layer includes: a recording magnetic film for recording the information, the recording magnetic film being formed of a perpendicular magnetic anisotropy film; a readout magnetic film for optically reading out the information, the readout magnetic film being capable of being magnetically coupled with the recording magnetic film by an exchange-coupling force; and a controlling magnetic film, provided between the recording magnetic film and the readout magnetic film, for controlling the exchange-coupling force. The controlling magnetic film has in-plane magnetic anisotropy at room temperature, thereby suppressing the exchange-coupling force between the recording magnetic film and the readout magnetic film, and when the temperature of the controlling magnetic film reaches a predetermined temperature by a readout light irradiation, the controlling magnetic film stops the suppression of the exchange-coupling force, whereby the information recorded in the recording magnetic film is magnetically transferred to the readout magnetic film.
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