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Atomic Vibrational Dynamics of Thin Films Studied by Nuclear Resonant Inelastic X-Ray Scattering: Amorphous Tb1−x Fe x Alloys

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Abstract

Nuclear resonant inelastic X-ray scattering (NRIXS) of 14.4125 keV synchrotron radiation was used to measure directly the partial vibrational density of states (VDOS), g(E), of vapor-quenched amorphous Tb1−x 57Fe x thin film alloys (0.20≤x≤0.82). The structure of the samples was characterized by X-ray diffraction and Mössbauer spectroscopy. The behavior of the Lamb-Mössbauer factor obtained from measured vibrational excitation probability densities indicates vibrational softening with increasing Tb content. A plot of g(E)/E 2 versus E proves the existence of non-Debye-like vibrational excitations below about 10 meV, becoming more pronounced with rising Tb content.

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Authors and Affiliations

  1. Institut für Physik, Gerhard-Mercator-Universität Duisburg, D-47048, Duisburg, Germany

    T. Ruckert, W. Keune & B. Sahoo

  2. Advanced Photon Source, Argonne National Laboratory, Argonne, IL, 60439, USA

    W. Sturhahn, T. S. Toellner & E. E. Alp

  3. Fachbereich Physik, Universität Rostock, D-18055, Rostock, Germany

    R. Röhlsberger

Authors
  1. T. Ruckert
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  2. W. Keune
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  3. B. Sahoo
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  4. W. Sturhahn
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  5. T. S. Toellner
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  6. E. E. Alp
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  7. R. Röhlsberger
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Correspondence to W. Keune.

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Ruckert, T., Keune, W., Sahoo, B. et al. Atomic Vibrational Dynamics of Thin Films Studied by Nuclear Resonant Inelastic X-Ray Scattering: Amorphous Tb1−x Fe x Alloys. Hyperfine Interactions 144, 65–76 (2002). https://doi.org/10.1023/A:1025463317430

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