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 2 proves the existence of non-Debye-like vibrational excitations below about 10 meV, becoming more pronounced with rising Tb content.
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Ruckert, T. et al. (2003). Atomic Vibrational Dynamics of Thin Films Studied by Nuclear Resonant Inelastic X-Ray Scattering: Amorphous Tb1−x Fe x Alloys. In: Gütlich, P., Fitzsimmons, B.W., Rüffer, R., Spiering, H. (eds) Mössbauer Spectroscopy. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0045-1_6
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DOI: https://doi.org/10.1007/978-94-010-0045-1_6
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