发明授权
- 专利标题: Magnetic recording medium containing first and second recording layers, each layer containing a columnar structure
- 专利标题(中): 含有第一和第二记录层的磁记录介质,每层包含柱状结构
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申请号: US11105045申请日: 2005-04-12
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公开(公告)号: US07556871B2公开(公告)日: 2009-07-07
- 发明人: Takayuki Ichihara , Atsushi Nakamura , Ichiro Tamai , Yuzuru Hosoe
- 申请人: Takayuki Ichihara , Atsushi Nakamura , Ichiro Tamai , Yuzuru Hosoe
- 申请人地址: NL Amsterdam
- 专利权人: Hitachi Global Storage Technologies Netherlands B.V.
- 当前专利权人: Hitachi Global Storage Technologies Netherlands B.V.
- 当前专利权人地址: NL Amsterdam
- 代理机构: Townsend and Townsend and Crew LLP
- 代理商 Darren Gold
- 优先权: JP2004-117009 20040412
- 主分类号: G11B5/66
- IPC分类号: G11B5/66
摘要:
Embodiments of the invention provide a perpendicular magnetic recording medium capable of reconciling a high recording density with high thermal stability, and having a high write-ability while maintaining high magnetic anisotropy energy. In one embodiment, a perpendicular magnetic recording medium has a soft-magnetic underlayer, and magnetic recording layers, and the magnetic recording layers comprises a first recording layer containing magnetic grains oriented in a direction normal to a medium plane, and a second recording layer containing magnetic grains tilted in a cross-track direction. There can be provided a perpendicular magnetic recording medium resistant to thermal fluctuation, small in medium noise, and excellent in write-ability.
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