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High-frequency dynamics in metallic glasses

Using inelastic x-ray scattering we studied the collective dynamics of the glassy alloy Ni33Zr67 in the first pseudo-Brillouin-zone, an energy-momentum region still unexplored in metallic glasses. We determine key properties such as the momentum transfer dependence of the sound velocity and of the a...

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Bibliographic Details
Published in:Physical review letters 2006-04, Vol.96 (13), p.135501-135501
Main Authors: Scopigno, T, Suck, J-B, Angelini, R, Albergamo, F, Ruocco, G
Format: Article
Language:English
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Summary:Using inelastic x-ray scattering we studied the collective dynamics of the glassy alloy Ni33Zr67 in the first pseudo-Brillouin-zone, an energy-momentum region still unexplored in metallic glasses. We determine key properties such as the momentum transfer dependence of the sound velocity and of the acoustic damping, discussing the results in the general context of recently proposed pictures for acoustic dynamics in glasses. Specifically, we demonstrate the existence in this strong glass of well defined (in the Ioffe-Regel sense) acoustic-like excitations well above the boson peak energy.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.96.135501