Einstein oscillator in highly-random-packed bulk metallic glass

Tang, M. B.; Bai, H. Y.; Pan, M. X.; Zhao, D. Q.; Wang, W. H.
January 2005
Applied Physics Letters;1/10/2005, Vol. 86 Issue 2, p021910
Academic Journal
Metallic glasses have often been regarded as ideal model systems of dense random packing with strong interaction among their components. Here we report direct evidence for the presence of the Einstein oscillator with an Einstein temperature θE of 74 K, which induces the boson peak at 4.9 meV in bulk metallic glass Zr46.75Ti8.25Cu7.5Ni10Be27.5. The presence of an Einstein oscillator suggests the existence of the vibrations of loose atoms in an independent localized harmonic mode in the highly random packed metallic glasses.


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