发明授权
- 专利标题： Magnetic recording disk with antiferromagnetically coupled master layer including copper
- 专利标题（中）： 具有反铁磁耦合主磁层（包括铜）的磁记录盘
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申请号： US10931642申请日： 2004-08-31
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公开(公告)号： US07419730B2公开(公告)日： 2008-09-02
- 发明人: Xiaoping Bian , Mary Frances Doerner , Tetsuya Kanbe , Mark Mercado , Mohammad Mirzamaani , Adam Polcyn , Kai Tang
- 申请人： Xiaoping Bian , Mary Frances Doerner , Tetsuya Kanbe , Mark Mercado , Mohammad Mirzamaani , Adam Polcyn , Kai Tang
- 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
- 代理商 G. Marlin Knight
- 主分类号： G11B5/66
- IPC分类号： G11B5/66
摘要：
An antiferromagnetically coupled (AFC) magnetic recording medium with an AFC master layer comprising at least two magnetic layers with the top magnetic layer including copper is described. The slave layer is separated from the master layer structure by a nonmagnetic spacer layer selected to antiferromagnetically couple the layers. The master layer structure according to the invention includes a bottom and top layer of distinct ferromagnetic materials. Preferably, the top layer of the master layer is a cobalt alloy including from 1 to 5 at. % copper with an example being CoPt13Cr20B8Cu2. The AFC magnetic layer structure can be used with a variety of substrates including circumferentially textured glass and NiP/AlMg.