%0 Journal Article
%T Dynamic sound attenuation at hypersonic frequencies in silica glass
%+ Laboratoire des colloïdes, verres et nanomatériaux (LCVN)
%A Levelut, Claire
%A Le Parc, Rozenn
%A Pelous, Jacques
%< avec comité de lecture
%@ 1098-0121
%J Physical Review B: Condensed Matter and Materials Physics (1998-2015)
%I American Physical Society
%V 73
%P 0652201
%8 2006
%D 2006
%Z cond-mat/0601096
%K vitreous silica
%K hypersound attenuation
%Z 78.35.+c,63.20.Kr,61.43.Fs
%Z Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn]Journal articles
%X In order to clarify the origin of the dominant processes responsible for the acoustic attenuation of phonons, which is a much debatted topic, we present Bril louin scattering experiments in various silica glasses of different OH impurities content. A large temperature range, from 5 to 1500 K is investigated, up to the glass transition temperature. Comparison of the hypersonic wave attenuation in various samples allows to identify two different processes. The first one induce s a low temperature peak related to relaxational processes; it is strongly sensitive to the extrinsic defects. The second, dominant in the hig h temperature range, is weakly dependent on the impurities and can be ascribed to anharmonic interactions.
%G English
%2 https://hal.science/hal-00016521/document
%2 https://hal.science/hal-00016521/file/art-ATTENUATION-rev.pdf
%L hal-00016521
%U https://hal.science/hal-00016521
%~ CNRS
%~ UNIV-MONTP2
%~ LCVN
%~ UNIV-MONTPELLIER
%~ UM1-UM2