Direct Observation of Magnetic Friedel Oscillation at the Fe (001) Surface

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  • 鉄の表面近傍の特異な磁性を発見――原子一層毎に磁気モーメントの大きさが増減する
  • テツ ノ ヒョウメン キンボウ ノ トクイ ナ ジセイ オ ハッケン : ゲンシ イッソウ ゴト ニ ジキ モーメント ノ オオキサ ガ ゾウゲン スル

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Abstract

<p>The surface magnetism of Fe (001) was studied in an atomic layer-by-layer fashion by using the in situ 57Fe probe layer method with a synchrotron Mössbauer source. The observed internal hyperfine field Hint exhibits a marked decrease at the surface and an oscillatory behavior with increasing depth in the individual upper four layers below the surface. The calculated layer-depth dependencies of the effective hyperfine field, |Heff|, isomer shift, δ, and quadrupole shift, 2ε, agree well with the observed experimental parameters. These results provide the first experimental evidence for the magnetic Friedel oscillations, which penetrate several layers from the Fe (001) surface.</p>

Journal

  • Butsuri

    Butsuri 77 (1), 23-28, 2022-01-05

    The Physical Society of Japan

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