发明申请
- 专利标题: PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING APPARATUS
- 专利标题(中): 全磁记录介质和磁记录装置
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申请号: US12488035申请日: 2009-06-19
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公开(公告)号: US20090257147A1公开(公告)日: 2009-10-15
- 发明人: Antony Ajan
- 申请人: Antony Ajan
- 申请人地址: JP Kawasaki-shi
- 专利权人: FUJITSU LIMITED
- 当前专利权人: FUJITSU LIMITED
- 当前专利权人地址: JP Kawasaki-shi
- 主分类号: G11B5/127
- IPC分类号: G11B5/127 ; G11B5/667
摘要:
A disclosed perpendicular magnetic recording medium includes a substrate; a soft magnetic underlayer disposed on the substrate and having no remanent magnetization; and a ferromagnetic recording layer disposed on the soft magnetic underlayer. The soft magnetic underlayer includes at least three soft magnetic layers laid one above the other with a non-magnetic intermediate layer interposed between every two adjacent soft magnetic layers. Among the (at least) three soft magnetic layers, at least one pair of soft magnetic layers form ferromagnetic coupling. Among the (at least) three soft magnetic layers, at least one pair of soft magnetic layers form antiferromagnetic coupling.
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