Effect of adsorbate carbon on spin reorientation transitions in Cu-capped ultrathin Ni films on Cu(0 0 1)

Takeshi Nakagawa, Hirokazu Watanabe, Toshihiko Yokoyama

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)

抄録

We have reinvestigated the Cu capping effect for Ni films on clean Cu(0 0 1) by means of polar and longitudinal magneto-optical Kerr effect measurements in order to account for previous discrepancies among the results regarding whether the Cu capping stabilizes perpendicular or in-plane magnetization. We concluded that Cu capping stabilizes perpendicular magnetization. We also found that the previous erroneous observation of in-plane stabilization could be accounted for by the presence of a small amount of C contamination, which was revealed to stabilize perpendicular magnetization surprisingly. The C atoms were found to act as surfactants and were always located at the top surface. As regards perpendicularly magnetized films on clean Cu(0 0 1), the enhancement of the coercivity with Cu capping was observed. This finding indicates that Cu does not act as a simple magnetism killer but effectively suppresses the surface anisotropy that favors in-plane magnetization.

本文言語英語
ページ(範囲)262-269
ページ数8
ジャーナルSurface Science
599
1-3
DOI
出版ステータス出版済み - 12月 30 2005
外部発表はい

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 表面および界面
  • 表面、皮膜および薄膜
  • 材料化学

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