发明授权
- 专利标题: Magnetoresistive device of the CCP (current perpendicular to plane) type with single-domain control of magnetization, and associated magnetic disk system
- 专利标题(中): CCP的磁阻器件(电流垂直于平面)型,具有单域控制磁化,以及相关的磁盘系统
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申请号: US12126567申请日: 2008-05-23
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公开(公告)号: US08094420B2公开(公告)日: 2012-01-10
- 发明人: Toshiyuki Ayukawa , Takahiko Machita , Daisuke Miyauchi , Tsutomu Chou , Koji Shimazawa , Shinji Hara , Tomohito Mizuno , Yoshihiro Tsuchiya
- 申请人: Toshiyuki Ayukawa , Takahiko Machita , Daisuke Miyauchi , Tsutomu Chou , Koji Shimazawa , Shinji Hara , Tomohito Mizuno , Yoshihiro Tsuchiya
- 申请人地址: JP Tokyo
- 专利权人: TDK Corporation
- 当前专利权人: TDK Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 主分类号: G11B5/39
- IPC分类号: G11B5/39
摘要:
The invention provides a magnetoresistive device of the CCP (current perpendicular to plane) structure comprising a magnetoresistive unit sandwiched between soft magnetic shield layers with a current applied in the stacking direction. The magnetoresistive unit comprises a nonmagnetic intermediate layer sandwiched between ferromagnetic layers. A planar framework positions the soft magnetic shield layers and comprises a combination of a nonmagnetic gap layer with a bias magnetic field-applying layer constructed by repeating the stacking of a multilayer unit comprising a nonmagnetic underlay layer and a high coercive material layer. The nonmagnetic gap layer is designed and located such that a magnetic flux given out of the bias magnetic field-applying layer is efficiently directed along a closed magnetic path around the framework to form a single domain of magnetization.
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