发明名称 |
A magnetooptical recording medium and information recording and reproducing methods using the recording medium. |
摘要 |
<p>A magnetooptical recording medium includes a first magnetic layer in which data is to be stored, and a second magnetic layer. The first magnetic layer is a perpendicular magnetization film at both room temperature and raised temperatures. The second magnetic layer is a perpendicular or in-plane magnetization film at room temperature and changed to an in-plane or perpendicular magnetization film at raised temperatures. A recording method includes, for example, a step of projecting a light spot on the recording medium from the side of the second magnetic layer, a step of changing only a high-temperature area within a light spot projection portion of the second magnetic layer to an in-plane or perpendicular magnetization film, and a step of detecting information stored in the first magnetic layer by detecting a reflective light from the recording medium. The reflective light is influenced by magneto-optic effect of the perpendicular magnetization film portion. <IMAGE></p> |
申请公布号 |
EP0586175(A1) |
申请公布日期 |
1994.03.09 |
申请号 |
EP19930306690 |
申请日期 |
1993.08.24 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
NISHIMURA, NAOKI;OMATA, HIROSHI;HONGUU, KAZUOKI |
分类号 |
G11B11/10;G11B11/105;(IPC1-7):G11B11/10 |
主分类号 |
G11B11/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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