1. Return field-induced partial erasure in perpendicular recording using trailing-edge shielded writers
- Author
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Bai, Daniel Z., Luo, Peng, Torabi, Adam, Terrill, Dave, Wang, James, Stoev, Kroum, Liu, Francis, Moneck, Matthew, Tang, Yuhui, and Zhu, Jian-Gang
- Subjects
Magnetic recorders and recording -- Research ,Induction, Electromagnetic -- Research ,Business ,Electronics ,Electronics and electrical industries - Abstract
Return 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. Index Terms--Partial erasure, perpendicular recording, return field, shielded pole head.
- Published
- 2007