Phonon Density of States of Pseudomorphic fcc-Fe Film

  • Tanaka Takayuki
    Kagami Memorial Laboratory for Materials Science and Technology, Waseda University Department of Applied Physics, Waseda University
  • Tajima Atsushi
    Kagami Memorial Laboratory for Materials Science and Technology, Waseda University Department of Applied Physics, Waseda University
  • Moriizumi Ryuichi
    Kagami Memorial Laboratory for Materials Science and Technology, Waseda University Department of Applied Physics, Waseda University
  • Oshima Chuhei
    Kagami Memorial Laboratory for Materials Science and Technology, Waseda University Department of Applied Physics, Waseda University
  • Tsunoda Yorihiko
    Department of Applied Physics, Waseda University
  • Seto Makoto
    Research Reactor Institute, Kyoto University
  • Kitao Shinji
    Research Reactor Institute, Kyoto University
  • Mitsui Takaya
    Japan Atomic Energy Research Institute

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Abstract

The phonon density of states of a pseudomorphic fcc-Fe film with ∼3 monolayers has been investigated by nuclear resonant inelastic scattering. The fcc-Fe layers are intercalated into an interface between monolayer hexagonal boron nitride and a Ni(111) substrate with a commensurate relation. The in-plane nearest-neighbor distance of the fcc-Fe film is shorter than that of uncompressed fcc-Fe precipitates in Cu by −1.8%. The compression increases the mean force constant of the fcc-Fe film, which is higher than that of uncompressed fcc-Fe precipitates by 5.8%.

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