发明授权
- 专利标题： Magneto resistive head and magnetic recording apparatus
- 专利标题（中）： 磁阻头和磁记录装置
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申请号： US10660865申请日： 2003-09-11
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公开(公告)号： US07031123B2公开(公告)日： 2006-04-18
- 发明人: Takayoshi Ohtsu , Satoshi Shigematsu , Kouji Nishioka , Takao Imagawa , Kouji Kataoka , Masatoshi Arasawa , Norifumi Miyamoto
- 申请人： Takayoshi Ohtsu , Satoshi Shigematsu , Kouji Nishioka , Takao Imagawa , Kouji Kataoka , Masatoshi Arasawa , Norifumi Miyamoto
- 申请人地址： JP Odawara
- 专利权人： Hitachi Global Storage Technologies Japan, Ltd.
- 当前专利权人： Hitachi Global Storage Technologies Japan, Ltd.
- 当前专利权人地址： JP Odawara
- 代理机构： Townsend and Townsend and Crew LLP
- 优先权： JP2002-267552 20020913
- 主分类号： G11B5/39
- IPC分类号： G11B5/39
摘要：
A magnetoresistive head comprises a free magnetic layer that has first and second free magnetic films sandwiching a non-magnetic intermediate film therebetween, the respective magnetizing directions of the first and the second free magnetic films are antiparallel. The length of the free magnetic layer in the direction of the track width is 200 nm or less, and a difference between a product of saturation magnetic flux density and a film thickness of the first free magnetic film, and that of the second free magnetic film is within a range from 1 to 3 nmT. By this structure, the variation of output and the variation of asymmetry is greatly decreased at a track width of 200 nm or less.
公开/授权文献
- US20040052009A1 Magneto resistive head and magnetic recording apparatus 公开/授权日：2004-03-18
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