发明申请
- 专利标题： Perpendicular magnetic recording medium, method of evaluating magnetic properties of the same
- 专利标题（中）： 垂直磁记录介质，磁性能评价方法
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申请号： US11715132申请日： 2007-03-06
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公开(公告)号： US20070217048A1公开(公告)日： 2007-09-20
- 发明人: Hiroaki Nemoto , Ikuko Takekuma , Yuzuru Hosoe
- 申请人： Hiroaki Nemoto , Ikuko Takekuma , 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
- 优先权： JP2006-070462 20060315
- 主分类号： G11B5/02
- IPC分类号： G11B5/02 ; G11B5/82
摘要：
Embodiments in accordance with the present invention provide a perpendicular magnetic recording medium which is easy to record, offers superior thermal stability of recording magnetization, and allows high-density recording. In one embodiment, a perpendicular magnetic layer with controlled magnetic properties is used as a magnetic storage layer of a perpendicular magnetic recording medium, the magnetic properties having been controlled such that an indicator σhsw [%] of the dispersion of magnetization switching fields in the perpendicular magnetic layer and an indicator Dn [nm] of the intensity of exchange interactions, in film surface directions, in the perpendicular magnetic layer satisfy inequalities σhsw/27+Dn/90 20. The indicators can be measured using a magnetometer.