发明名称 |
Magneto-optical disk device capable of performing magnetic domain expansion reproduction by dc magnetic field and reproducing method |
摘要 |
A magneto-optical disk apparatus (100) includes an optical pickup (101) and a magnetic head (113). The optical pickup (101) irradiates a magneto-optical recording medium (10) with a laser beam of such intensity that a part of a reproducing layer of the magneto-optical recording medium (10) is heated to a temperature over the compensation temperature. The magnetic head (113) applies to the magneto-optical recording medium (10) a DC magnetic field having intensity weaker than the intensity at which magnetization of a transition-metal-richarea in a part of the reproducing layer heated to a temperature over the compensation temperature is inverted. The optical pickup (101) detects a magneto-optical signal varying in intensity between two levels. As a result, a signal can be reproduced correctly from the magneto-optical recording medium (10) by a magnetic domain enlargement system. <IMAGE> |
申请公布号 |
AU4692201(A) |
申请公布日期 |
2001.10.30 |
申请号 |
AU20010046922 |
申请日期 |
2001.04.16 |
申请人 |
SANYO ELECTRIC CO., LTD. |
发明人 |
HITOSHI NOGUCHI;ATSUSHI YAMAGUCHI;HIROKI ISHIDA;NAOYUKI TAKAGI;KENICHIRO MITANI |
分类号 |
G11B11/105 |
主分类号 |
G11B11/105 |
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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