| Numéro |
J. Phys. Colloques
Volume 42, Numéro C5, Octobre 1981
ICIFUAS-7Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C5-517 - C5-521 | |
| DOI | https://doi.org/10.1051/jphyscol:1981578 | |
ICIFUAS-7
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-517-C5-521
DOI: 10.1051/jphyscol:1981578
Metals Research Laboratory, Brown University, Providence, RI 02912, U.S.A.
Seventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. Colloques 42 (1981) C5-517-C5-521
DOI: 10.1051/jphyscol:1981578
ULTRASONIC STUDIES OF METALLIC GLASSES AT LOW TEMPERATURES
G. Park, A. Hikata et C. ElbaumMetals Research Laboratory, Brown University, Providence, RI 02912, U.S.A.
Abstract
Results are reported of ultrasonic studies of amorphous Pd.82Si.18, Pd.40Ni.40P.20 and Pd.775Si.165Cu0.060 at frequencies from 10 MHz to 600 MHz (transverse) and temperatures down to 0.27 K. The attenuation is found to contain an amplitude dependent (saturable) component. These observations, as well as the temperature dependence of the velocity changes, are consistent with the predictions of the two level tunneling systems (TLS) theory. Contrary to the predictions of this theory, however, linear frequency dependence and essentially no temperature dependence of saturable attenuation changes were observed at very low temperatures.