发明授权
US07595959B2 Recording heads including a magnetically damped write pole and recording systems including such heads 有权
记录头包括磁阻写入磁极和包括这种磁头的记录系统

Recording heads including a magnetically damped write pole and recording systems including such heads
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.
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