Return Field-Induced Partial Erasure in Perpendicular Recording Using Trailing-Edge Shielded Writers
2007; IEEE Magnetics Society; Volume: 43; Issue: 2 Linguagem: Inglês
10.1109/tmag.2006.888198
ISSN1941-0069
AutoresDaniel Z. Bai, Peng Luo, A.F. Torabi, Dave Terrill, James Wang, K. Stoev, Francis Liu, Matthew T. Moneck, Yuhui Tang, Jian‐Gang Zhu,
Tópico(s)Magnetic properties of thin films
ResumoReturn field-induced partial erasure (RFPE) in trailing-edge shielded perpendicular writers has been studied, both by modeling and by experiments. For a given head-media combination, the return field underneath the trailing shield increases with increasing write current. Once exceeding a certain threshold, it will cause partial erasure of the bits that have just been written by the main pole. Recording performance, such as reverse overwrite, spectral signal-to-noise ratio, and bit-error rate are all found degraded at high write currents, due to RFPE. Design optimization of both head and media together is needed, in order to maximize the advantage of a trailing-edge shielded pole head and minimize the impact of RFPE
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