High coercivity and magnetic domain observation in epitaxially grown particulate FePt thin films

T. Shima*, K. Takanashi, Y. K. Takahashi, K. Hono, G. Q. Li, S. Ishio

*この研究の対応する著者

研究成果: Article査読

30 被引用数 (Scopus)

抄録

We have investigated the magnetic domains of high coercive FePt[001]/MgO[001] films with various morphologies by magnetic force microscopy (MFM). The film morphology changes from particulate to continuous depending on the film thickness (t), accompanied by a drastic decrease in coercivity when t exceeds the critical thickness, tc = 45 nm. The film with t = 10 nm is comprised of only single-domain particles of approximately 50 nm, which has a huge coercivity as high as 40kOe. The isolated particles larger than 200 nm are multi-domain, and the films containing these isolated particles show slightly lower coercivity. The coercivity drastically decreases with the percolation of the particles.

本文言語English
ページ(範囲)171-177
ページ数7
ジャーナルJournal of Magnetism and Magnetic Materials
266
1-2
DOI
出版ステータスPublished - 2003 10
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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