Ultrasonic wave velocities and attenuation in IVb-Vb-VIb chalcogenide glasses: 2–300 K |
| |
Authors: | JM Farley GA Saunders |
| |
Institution: | Department of Applied Physics and Electronics, University of Durham, South Road, Durham, UK |
| |
Abstract: | The velocities and attenuation of longitudinal and shear ultrasonic (12 MHz) waves have been measured for several chalcogenide glasses (Ge10Si12As30Te48, Ge20As30Se50, Si20As32Te48, Ge10Si12As29Te49, Ge12S14As35Te49). The bulk, shear and Young's moduli and the Poisson ratio are found to be insensitive to the glass composition. The temperature dependences of the longitudinal and shear-wave velocities are negative at higher temperatures and approach 0 K with a zero slope. The ultrasonic attenuation does not exhibit either the broad loss peak or the smaller low-temperature peak found in many other glasses: the elastic and anelastic behaviour is quite different from that of oxide glasses — no evidence for the existence of two-level systems has been obtained from the ultrasonic measurements. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|