Constraints in glasses Acoustic attenuation in GexS1-xand GexSe1-xglasses

Publisher Website
Google Scholar
Abstract
Measurements of acoustic attenuation and relative acoustic velocity at 550 kHz were taken between 4·2 and 200 K in GexS1-x and GexSe1-x glasses, for x = 0·2, 0·33 and 0·4. For x = 0·2 and 0·33, glasses in both systems show a low-temperature peak in the attenuation, together with an increasing attenuation at higher temperatures as the glass-transition temperature is approached. With x = 0·4 the loss in both glasses is very much smaller at all temperatures. These results are interpreted in terms of constraints acting on the glass-forming network. The velocity decreases with increasing temperature in all the glasses, so that GeS2 and GeSe2 differ from other tetrahedrally coordinated glases in this respect.

This publication has 19 references indexed in Scilit: