| Issue |
J. Phys. Colloques
Volume 44, Number C9, Décembre 1983
ECIFUAS-4Fourth European Conference on Internal Friction and Ultrasonic Attenuation in Solids / Quatrième Conférence Européenne sur le Frottement Intérieur et l'Atténuation Ultrasonore dans les Solides |
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|---|---|---|
| Page(s) | C9-419 - C9-424 | |
| DOI | https://doi.org/10.1051/jphyscol:1983961 | |
ECIFUAS-4
Fourth European Conference on Internal Friction and Ultrasonic Attenuation in Solids / Quatrième Conférence Européenne sur le Frottement Intérieur et l'Atténuation Ultrasonore dans les Solides
J. Phys. Colloques 44 (1983) C9-419-C9-424
DOI: 10.1051/jphyscol:1983961
Department of Physics and Condensed Matter Sciences Laboratory, Colorado State University, Fort Collins, Colorado 80523, U.S.A.
Fourth European Conference on Internal Friction and Ultrasonic Attenuation in Solids / Quatrième Conférence Européenne sur le Frottement Intérieur et l'Atténuation Ultrasonore dans les Solides
J. Phys. Colloques 44 (1983) C9-419-C9-424
DOI: 10.1051/jphyscol:1983961
ULTRASONIC ATTENUATION DUE TO ZENER RELAXATION IN SINGLE-CRYSTAL PALLADIUM HYDRIDE
R.G. Leisure, T. Kanashiro, P.C. Riedi et D.K. HsuDepartment of Physics and Condensed Matter Sciences Laboratory, Colorado State University, Fort Collins, Colorado 80523, U.S.A.
Abstract
Attenuation measurements have been performed for the longitudinal and the two transverse ultrasonic waves propagating along the [110] crystalline axis in single-crystal α' phase PdH .64. Attenuation peaks are observed for all three modes. For a measuring frequency of 10.8 MHz the attenuation maxima occur at approximately 190K for the longitudinal and C' transverse modes and approximately 180K for the C44 mode. The relative magnitudes of the peaks are interpreted in terms of the gradients of the hydrogen-vacancy ordering energies at nearest and second-nearest neighbor positions.