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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)262-269
Number of pages8
JournalSurface Science
Volume599
Issue number1-3
DOIs
Publication statusPublished - Dec 30 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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