发明申请
- 专利标题: Patterned perpendicular magnetic recording medium and magnetic recording and reproducing apparatus
- 专利标题(中): 图案垂直磁记录介质和磁记录和再现装置
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申请号: US12320602申请日: 2009-01-29
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公开(公告)号: US20090201607A1公开(公告)日: 2009-08-13
- 发明人: Yousuke Isowaki , Tomoyuki Maeda , Yoshiyuki Kamata
- 申请人: Yousuke Isowaki , Tomoyuki Maeda , Yoshiyuki Kamata
- 申请人地址: JP Tokyo
- 专利权人: KABUSHIKI KAISHA TOSHIBA
- 当前专利权人: KABUSHIKI KAISHA TOSHIBA
- 当前专利权人地址: JP Tokyo
- 优先权: JP2008-24903 20080205
- 主分类号: G11B5/127
- IPC分类号: G11B5/127 ; G11B5/66
摘要:
It is made possible to provide a patterned perpendicular magnetic recording medium that has smaller write magnetic field and the variation of magnetic characteristics in the bit regions, generates fewer reversed magnetic domains in the position control information regions of the head, and has excellent thermal stability. A patterned perpendicular magnetic recording medium includes: a nonmagnetic substrate; a soft magnetic base layer formed on the nonmagnetic substrate; a nonmagnetic intermediate layer formed on the soft magnetic base layer; and a perpendicular magnetic recording layer formed on the nonmagnetic intermediate layer, and including a stacked structure of a CoPt-based crystalline film having a Pt content in the range of 5 atomic percent to 35 atomic percent and a rare-earth and transition metal alloy amorphous film formed on the CoPt-based crystalline film. The CoPt-based crystalline film and the rare-earth and transition metal alloy amorphous film are exchange-coupled.
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