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Magnetic Friedel Oscillation at the Fe(001) Surface: Direct Observation by Atomic-Layer-Resolved Synchrotron Radiation
Mitsui, T; Sakai, S; Li, S; Ueno, T; Watanuki, T; Kobayashi, Y; Masuda, R; Seto, M; Akai, H.
Afiliação
  • Mitsui T; National Institutes for Quantum and Radiological Science and Technology, Sayo, Hyogo 679-5148, Japan.
  • Sakai S; National Institutes for Quantum and Radiological Science and Technology, Takasaki, Gunma 370-1292, Japan.
  • Li S; National Institutes for Quantum and Radiological Science and Technology, Takasaki, Gunma 370-1292, Japan.
  • Ueno T; National Institutes for Quantum and Radiological Science and Technology, Takasaki, Gunma 370-1292, Japan.
  • Watanuki T; National Institutes for Quantum and Radiological Science and Technology, Sayo, Hyogo 679-5148, Japan.
  • Kobayashi Y; National Institutes for Quantum and Radiological Science and Technology, Takasaki, Gunma 370-1292, Japan.
  • Masuda R; National Institutes for Quantum and Radiological Science and Technology, Sayo, Hyogo 679-5148, Japan.
  • Seto M; National Institutes for Quantum and Radiological Science and Technology, Takasaki, Gunma 370-1292, Japan.
  • Akai H; Institute for Integrated Radiation and Nuclear Science, Kyoto University, Asashironishi, Kumatori, Osaka 590-0494, Japan.
Phys Rev Lett ; 125(23): 236806, 2020 Dec 04.
Article em En | MEDLINE | ID: mdl-33337194
The surface magnetism of Fe(001) was studied in an atomic layer-by-layer fashion by using the in situ iron-57 probe layer method with a synchrotron Mössbauer source. The observed internal hyperfine field H_{int} 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 |H_{eff}|, 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.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Japão

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Japão