Electron holography observation of in-plane domain structure in writer pole for perpendicular recording heads

K. Hirata, Y. Ishida, J. J. Kim, H. Kasai, D. Shindo, M. Takahashi, A. Tonomura

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A direct observation of the in-plane domain structure of the writer pole of a perpendicular recording head was performed by electron holography in order to investigate the cause of pole erasure due to the instability of the domain wall behavior. The instability of domain structure of the writer pole generated a stray field on the air bearing surface of the writer pole. The domain wall trapping at the pole tip was found quite effective to form a stable domain structure in the remanent state, and it reflected domain wall energy change and initial domain structure of the writer pole.

Original languageEnglish
Article number07D538
JournalJournal of Applied Physics
Volume105
Issue number7
DOIs
Publication statusPublished - 2009 Apr 27

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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