| Numéro |
J. Phys. Colloques
Volume 42, Numéro C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-1085 - C5-1090 | |
| DOI | https://doi.org/10.1051/jphyscol:19815168 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-1085-C5-1090
DOI: 10.1051/jphyscol:19815168
Laboratoire de Cryophysique, Service des Basses Températures, Centre d'Etudes Nucléaires de Grenoble, 85 X, 38041 Grenoble Cedex, France
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-1085-C5-1090
DOI: 10.1051/jphyscol:19815168
ULTRASONIC ATTENUATION AND OCCURENCE OF THE MARTENSITIC TRANSFORMATION IN THE HIGH Tc A15 COMPOUND V3Si
A.F. Khoder, M. Couach et E. BonjourLaboratoire de Cryophysique, Service des Basses Températures, Centre d'Etudes Nucléaires de Grenoble, 85 X, 38041 Grenoble Cedex, France
Abstract
The [100] shear modulus C44 is known to be nearly temperature independent in the case of V3Si, an extensively studied compound for wich many authors tried to associate the lattice instability and the high superconducting transition temperature. We report new sound velocity and attenuation measurements of this [100] shear mode. The temperature change of the sound velocity displays a 6 % relative decrease while a large increase in the attenuation of this mode occurs for T decreasing from 80 K to Tc = 17 K. This new observation gives a strong support for a very recently proposed approach to the occurence of the structural transformation in V3Si.