Giant magnetic anisotropy energy and coercivity in Fe island and atomic wire on W(110)

Takeshi Nakagawa, Yasumasa Takagi, Toshihiko Yokoyama, Torsten Methfessel, Sandra Diehl, Hans Joachim Elmers

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

We have directly investigated the giant magnetic anisotropy energy and coercivity of monolayer (ML) Fe islands and stripes on flat and stepped W(110) surfaces using x-ray magnetic circular dichroism. Both for islands and stripes, the magnetic anisotropy energy is ∼1.0meV/atom, independent of the coverage below 0.5 ML. On the contrary, the coercive field of the islands rapidly drops from 4.3 T at 0.25 ML to 1.9 T at 0.50 ML, while that of the stripes moderately degrades from 3.5 T at 0.15 ML (∼3 atom rows) to 3.0 T at 0.50 ML. We explain the contrastive behavior for the islands and stripes by different nucleation and remagnetization processes. Considering the enhanced Fe moment, we find an unprecedented large value of the energy product BH max=5 MJ/m3.

本文言語英語
論文番号144418
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
86
14
DOI
出版ステータス出版済み - 10 25 2012
外部発表はい

All Science Journal Classification (ASJC) codes

  • 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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