Ref HAL: hal-00109714_v1
Ref Arxiv: cond-mat/0610693
DOI: 10.1103/PhysRevB.74.224202
WoS: 000243195600030
Ref. & Cit.: NASA ADS
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3 Citations
Résumé:

Comparison of the internal friction at hypersonic frequencies between a few K and the glass transition temperature Tg for various glasses brings out general features. At low temperature, internal friction is only weakly dependent on the material. At high temperature but still below Tg the internal friction for strong glasses shows a T-independent plateau in a very wide domain of temperature; in contrast, for fragile glass, a nearly linear variation of internal friction with T is observed. Anharmonicity appears dominant over thermally activated relaxational processes at high temperature.

Commentaires: accepted in Physical Review B