发明授权
- 专利标题: Magneto-optical recording medium
- 专利标题(中): 磁光记录介质
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申请号: US535967申请日: 1995-09-28
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公开(公告)号: US5824426A公开(公告)日: 1998-10-20
- 发明人: Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi , Kenji Ohta
- 申请人: Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi , Kenji Ohta
- 申请人地址: JPX Osaka
- 专利权人: Sharp Kabushiki kaisga
- 当前专利权人: Sharp Kabushiki kaisga
- 当前专利权人地址: JPX Osaka
- 优先权: JPX6-249795 19941014
- 主分类号: C23C14/18
- IPC分类号: C23C14/18 ; C23C14/34 ; G11B7/26 ; G11B11/105 ; G11B5/716 ; G11B5/66 ; G11B11/00
摘要:
A magneto-optical recording medium includes a readout layer having in-plane magnetization at room temperature and in which a transition occurs from in-plane magnetization to a perpendicular magnetization when temperature rises, and a recording layer for storing information thereon magneto-optically. In the readout layer made of GdFeCo by adding Nd thereto, an amount of Nd to be added changes in a direction perpendicular to its film surface, and an amount of Nd is larger on a light incidence side than on the other side. As a result, even when a laser with a short wavelength is used, high density recording can be achieved as undesirable recording and reproducing operations due to a change in a magnetic interaction is prevented and also deterioration in quality of a reproducing signal is prevented.