发明申请
- 专利标题： THERMALLY ASSISTED MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING DEVICE
- 专利标题（中）： 热辅助磁记录介质和磁记录和再现设备
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申请号： US13574932申请日： 2011-01-24
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公开(公告)号： US20120300600A1公开(公告)日： 2012-11-29
- 发明人: Tetsuya Kanbe , Atsushi Hashimoto , Takayuki Fukushima
- 申请人： Tetsuya Kanbe , Atsushi Hashimoto , Takayuki Fukushima
- 申请人地址： JP Minato-ku, Tokyo
- 专利权人： SHOWA DENKO K.K.
- 当前专利权人： SHOWA DENKO K.K.
- 当前专利权人地址： JP Minato-ku, Tokyo
- 优先权： JP2010-014271 20100126
- 国际申请： PCT/JP2011/051183 WO 20110124
- 主分类号： G11B13/04
- IPC分类号： G11B13/04 ; G11B5/66
摘要：
A thermally assisted magnetic recording medium having a structure in which a first magnetic layer 106 and a second magnetic layer 107 are formed on a substrate 101 in this order, wherein the first magnetic layer 106 has a granular structure containing a FePt alloy having a L10 structure, a CoPt alloy having a L10 crystal lattice structure or a CoPt alloy having a L11 crystal lattice structure, and at least one material for causing grain boundary segregation selected from the group consisting of SiO2, TiO2, Cr2O3, Al2O3, Ta2O5, ZrO2, Y2O3, CeO2, MnO, TiO, ZnO, and MgO, and the content of the material for causing grain boundary segregation in the first magnetic layer 106 is decreased from the substrate side to the second magnetic layer 107 side.