| Numéro |
J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981
International Conference on Phonon Physics
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|
|---|---|---|
| Page(s) | C6-72 - C6-74 | |
| DOI | https://doi.org/10.1051/jphyscol:1981622 | |
International Conference on Phonon Physics
J. Phys. Colloques 42 (1981) C6-72-C6-74
DOI: 10.1051/jphyscol:1981622
Laboratoire d'Ultrasons, Université Pierre et Marie Curie, Tour 13, 4 place Jussieu, 75230 Paris Cedex 05, France
J. Phys. Colloques 42 (1981) C6-72-C6-74
DOI: 10.1051/jphyscol:1981622
ATTENUATION AND VELOCITY CHANGE OF ACOUSTIC WAVES IN THE AMORPHOUS METAL PdSiCu FROM 0.05 K TO 90 K
P. DoussineauLaboratoire d'Ultrasons, Université Pierre et Marie Curie, Tour 13, 4 place Jussieu, 75230 Paris Cedex 05, France
Abstract
Previous acoustic experiments in a-PdSiCu were extended. Attenuation and velocity change were measured at various frequencies around 500 MHz from 0.05 K to 90 K . The attenuation is interpreted as the sum of two contributions : one due to the relaxation of the TLS and the other due to an activated process. The velocity change is explained with the same two preceding contributions ; however it is necessary to add not only the resonant contribution but also an electronic term varying as T2.