发明名称 |
Magneto-optical recording medium and method of reproducing information recorded on such medium |
摘要 |
A magneto-optical recording medium adapted for reproduction of a high resolution signal without the necessity of a reproducing magnetic field. The magneto-optical recording medium comprises a transparent substrate and deposits of a reproducing layer, a switch layer and a recording layer formed on the transparent substrate successively. The reproducing layer is a perpendicular magnetization film at a room temperature but is turned to an in-plane magnetization film when heated beyond a predetermined temperature. Each of the switch layer and the recording layer is a perpendicular magnetization film. The respective Curie temperatures Tc1, Tc2 and Tc3 of the reproducing layer, the switch layer and the recording layer satisfy the relationship of Tc1>Tc3>Tc2. When a reproducing laser beam is irradiated to the recording medium, the switched connection between the reproducing layer and the recording layer is interrupted in a high temperature region heated beyond the Curie temperature of the switch layer, whereby the reproducing layer is caused to present in-plane magnetization.
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申请公布号 |
US6030716(A) |
申请公布日期 |
2000.02.29 |
申请号 |
US19970971970 |
申请日期 |
1997.11.17 |
申请人 |
FUJITSU LIMITED |
发明人 |
IZUMI, HARUHIKO;TAMANOI, KEN;MORITSUGU, MASAHARU;MAEDA, MIYOZO;SUGIMOTO, TOSHIO;MATSUMOTO, KOJI;MIHARA, MOTONOBU |
分类号 |
G11B11/10;G11B7/125;G11B11/105;(IPC1-7):G11B5/66 |
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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