发明授权
- 专利标题: Recording heads including a magnetically damped write pole and recording systems including such heads
- 专利标题(中): 记录头包括磁阻写入磁极和包括这种磁头的记录系统
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申请号: US11170035申请日: 2005-06-29
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公开(公告)号: US07595959B2公开(公告)日: 2009-09-29
- 发明人: Mark William Covington , Ganping Ju , Werner Scholz , Michael Kevin Minor
- 申请人: Mark William Covington , Ganping Ju , Werner Scholz , Michael Kevin Minor
- 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: Pietragallo Gordon Alfano Bosick & Raspanti, LLP
- 代理商 Robert P. Lenart, Esq.; Alan G. Towner, Esq.
- 主分类号: G11B5/127
- IPC分类号: G11B5/127
摘要:
A magnetic recording system is disclosed in which the magnetization dynamics of the write head and recording medium are highly damped. The system may comprise a perpendicular recording head having a write pole, and a recording medium including a hard magnetic recording layer and a soft magnetic underlayer (SUL). The increased magnetic damping in the write pole and SUL suppresses precessional motion of the respective magnetizations, leading to a reduction in transition jitter caused by spurious head field fluctuations. The damping may be increased by providing films or multilayer structures that are doped with rare earth or transition metal elements. Exchange coupled laminates of doped and undoped layers may optimize both the effective damping and write field in the recording system.
公开/授权文献
- US20070003792A1 Damping control in magnetic recording systems 公开/授权日:2007-01-04