发明授权
- 专利标题: Multilayered magnetic films and thin-film magnetic heads using the same as a pole
- 专利标题(中): 使用与极相同的多层磁性膜和薄膜磁头
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申请号: US150504申请日: 1988-02-01
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公开(公告)号: US4814921A公开(公告)日: 1989-03-21
- 发明人: Yoshihiro Hamakawa , Kazuo Shiiki , Yoshihiro Shiroishi , Isamu Yuitoo , Hitoshi Numasaka , Noriyuki Kumasaka , Shigekazu Otomo , Eijin Moriwaki
- 申请人: Yoshihiro Hamakawa , Kazuo Shiiki , Yoshihiro Shiroishi , Isamu Yuitoo , Hitoshi Numasaka , Noriyuki Kumasaka , Shigekazu Otomo , Eijin Moriwaki
- 申请人地址: JPX Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX59-216143 19841017; JPX59-26227 19850215; JPX59-58295 19850325
- 主分类号: G11B5/31
- IPC分类号: G11B5/31 ; G11B5/127
摘要:
Multilayered magnetic films of the invention comprising at least two unit magnetic films each of which has a thickness of from 0.05 to 0.9 .mu.m and includes a plurality of ferromagnetic layers each having a thickness of from 0.01 to 0.2 .mu.m and a 1 nm to 10 nm thick first intermediate layer consisting of a ferromagnetic, nonmagnetic or antiferromagnetic material and provided between adjacent ferromagnetic layers, and a second intermediate layer having a thickness of from 10 to 40 nm, consisting of a nonmagnetic or antiferromagnetic material and provided between the at least two unit magnetic films. The multilayered magnetic film is suitable as a pole of a thin-film magnetic head. An underlayer may be further provided between the magnetic film and a substrate whereby a multilayered magnetic film having good characteristics can be obtained.