Damping of Dislocations in Lead Single Crystals
作者:
Warren P. Mason,
Arthur Rosenberg,
期刊:
Journal of Applied Physics
(AIP Available online 1967)
卷期:
Volume 38,
issue 4
页码: 1929-1936
ISSN:0021-8979
年代: 1967
DOI:10.1063/1.1709784
出版商: AIP
数据来源: AIP
摘要:
Measurements have been made of the attenuation of longitudinal waves along the 〈110〉 direction in a lead single crystal over a frequency range from 30 to 150 Mc/sec and in a temperature range from 60° to 300°K. The attenuation can be divided into a square‐law frequency term and a term consistent with the theoretical form of dislocation attenuation at high frequencies. By determining the high‐frequency asymptote of the dislocation internal friction and by assuming a reasonable dislocation density, the drag coefficient for the dislocations can be evaluated. The measurements are consistent with the sum of a phonon scattering term and a phonon viscosity term. The square‐law attenuation is about twice as large as the thermoelastic loss and over a temperature range is in agreement with the sum of a thermoelastic loss plus a phonon viscosity loss.
点击下载:
PDF
(595KB)
返 回