发明授权
- 专利标题: Apparatus and method for controlling remnant magnetization in a magnetic recording head
- 专利标题(中): 用于控制磁记录头中的残余磁化的装置和方法
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申请号: US11054456申请日: 2005-02-09
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公开(公告)号: US07440213B2公开(公告)日: 2008-10-21
- 发明人: Nurul Amin , Song S. Xue , Patrick J. Ryan
- 申请人: Nurul Amin , Song S. Xue , Patrick J. Ryan
- 申请人地址: US CA Scotts Valley
- 专利权人: Seagate Technology LLC
- 当前专利权人: Seagate Technology LLC
- 当前专利权人地址: US CA Scotts Valley
- 代理机构: Kinney & Lange, P.A.
- 主分类号: G11B27/36
- IPC分类号: G11B27/36 ; G11B5/03 ; G11B5/17
摘要:
The present invention provides a magnetic writer. The magnetic writer comprises a write circuit, a write pole, a first write coil for inducing a first magnetic field in the write pole by a first current provided by the write circuit, and a second write coil for inducing a second magnetic field in the write pole by a second current provided by the write circuit. The write circuit provides a first current through the first coil and a second current through the second coil. The write circuit controls the direction of the first current and the second current so that, during writing, the first magnetic field and the second magnetic field have components perpendicular to the air bearing surface that are in the same direction. When not writing, the first magnetic field and second magnetic field have components perpendicular to the air bearing surface in opposite directions.
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