发明授权
- 专利标题: Magneto-optical recording method and magneto-optical recording medium
- 专利标题(中): 磁光记录方法和磁光记录介质
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申请号: US890631申请日: 1992-05-28
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公开(公告)号: US5369629A公开(公告)日: 1994-11-29
- 发明人: Atsuyuki Watada , Toshiaki Tokita , Motoharu Tanaka
- 申请人: Atsuyuki Watada , Toshiaki Tokita , Motoharu Tanaka
- 申请人地址: JPX Tokyo
- 专利权人: Ricoh Company, Ltd.
- 当前专利权人: Ricoh Company, Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX3-155434 19910531
- 主分类号: G11B11/10
- IPC分类号: G11B11/10 ; G11B11/105 ; G11B13/04
摘要:
A magneto-optical recording method for recording information in an overwrite mode in a magneto-optical recording medium by the application of a laser beam is disclosed. The magneto-optical recording medium includes a substrate, and at least two magnetic recording layers overlaid thereon, with an exchange force working at least between the two magnetic recording layers, and the Curie temperature of each of the two magnetic recording layers being substantially the same. The magneto-optical recording method includes the step of conducting overwriting information by changing the power of the laser beam to be applied to at least two different levels, one at which the magnetic recording layers are heated to a temperature near or higher than the Curie temperature, and the other at which the magnetic recording layers are heated to a temperature lower than the Curie temperature, while a magnetic field is applied to the magneto-optical recording medium in one direction, in accordance with signals to be recorded in the magneto-optical recording medium, and this recording method requires only one initialization by the application of the magnetic field, but does not require any further initialization thereafter.
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