Magnetization process of Co/Pd(1 1 1) thin films: Chemisorption-induced spin-reorientation transition

Daiju Matsumura, Takeshi Nakagawa, Hirokazu Watanabe, Hitoshi Abe, Kenta Amemiya, Toshiaki Ohta, Toshihiko Yokoyama

研究成果: Contribution to journalArticle査読

5 被引用数 (Scopus)

抄録

Spin-reorientation transitions of Co/Pd(1 1 1) magnetic thin films induced by chemisorption of molecules have been investigated by the magneto-optical Kerr effect. The magnetic hysteresis curves during the phase transitions induced by CO adsorption were recorded with the polar and longitudinal Kerr geometries. Essential differences in the variations of the coercive field and the remanent magnetization were observed between the in-plane and perpendicular magnetization processes. It was found that the larger the area of perpendicular magnetization is, the larger the perpendicular coercive field becomes. On the contrary, as the area of in-plane magnetization is smaller, the in-plane coercive field becomes larger, although the enhancement is much less significant than in the perpendicular case. This difference is explained in terms of the different character of domain walls. NO adsorption has also been investigated. Similarities and dissimilarities between CO and NO adsorption indicate that NO stabilizes perpendicular magnetization even from the initial stage of adsorption, while the stabilization of perpendicular magnetization by CO adsorption occurs only at the second stage where the atop-site adsorption is completed and the bridge-site adsorption starts.

本文言語英語
ページ(範囲)1999-2003
ページ数5
ジャーナルSurface Science
602
11
DOI
出版ステータス出版済み - 6 1 2008
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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