发明授权
US06187460B1 Magneto-optical recording medium and method for reproducing information therein 失效
磁光记录介质及其中再现信息的方法

  • 专利标题: Magneto-optical recording medium and method for reproducing information therein
  • 专利标题(中): 磁光记录介质及其中再现信息的方法
  • 申请号: US08904888
    申请日: 1997-08-04
  • 公开(公告)号: US06187460B1
    公开(公告)日: 2001-02-13
  • 发明人: Naoki Nishimura
  • 申请人: Naoki Nishimura
  • 优先权: JP5-081962 19930408
  • 主分类号: G11B566
  • IPC分类号: G11B566
Magneto-optical recording medium and method for reproducing information therein
摘要:
A magneto-optical recording medium includes a first magnetic layer and a second magnetic layer. The first magnetic layer is a horizontal magnetization layer at room temperature but a perpendicular magnetization layer at a raised temperature. A transition temperature of the first layer continuously or stepwise increases from a light incidence side thereof light in a film thickness direction. The second magnetic layer is a perpendicular magnetization layer both at room temperature and at the raised temperature. In reproduction of information, an optical beam is applied onto the magneto-optical recording medium in which information is recorded by directions of magnetization. The information recorded in the second magnetic layer is transferred to the first magnetic layer and the information is read by the magneto-optical effect.
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