发明申请
- 专利标题: Perpendicular magnetic recording medium
- 专利标题(中): 垂直磁记录介质
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申请号: US11896486申请日: 2007-08-31
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公开(公告)号: US20080062583A1公开(公告)日: 2008-03-13
- 发明人: Shunji Takenoiri , Yasushi Sakai
- 申请人: Shunji Takenoiri , Yasushi Sakai
- 申请人地址: JP Tokyo
- 专利权人: Fuji Electric Device Technology Co., Ltd
- 当前专利权人: Fuji Electric Device Technology Co., Ltd
- 当前专利权人地址: JP Tokyo
- 优先权: JP2006-248628 20060913
- 主分类号: G11B5/33
- IPC分类号: G11B5/33
摘要:
A perpendicular magnetic recording medium composed of a nonmagnetic substrate having a surface onto which are provided a plurality of layers including, in the order recited, a soft underlayer; a nonmagnetic coupling layer; a hard magnetic pinning layer which is antiferromagnetically coupled to the soft underlayer at ambient temperature via the nonmagnetic coupling layer and which has an axis of easy magnetization which extends in a direction which is perpendicular to that of the surface of the nonmagnetic substrate; a nonmagnetic intermediate layer; and a magnetic recording layer. Such a perpendicular magnetic recording medium has an improved medium performance, with reduced noise originating from the presence of the soft underlayer, and no erasure of recorded magnetization when influenced by an external magnetic field.
公开/授权文献
- US07781080B2 Perpendicular magnetic recording medium 公开/授权日:2010-08-24