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Low temperature elastic behaviour of As-Sb-Se and Ge-Sb-Se glasses

Gopal, ESR and Mukundan, TS and Philip, J and Sathish, S (1987) Low temperature elastic behaviour of As-Sb-Se and Ge-Sb-Se glasses. In: Pramana: Journal of Physics, 28 (5). pp. 471-482.

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Abstract

The ternary glasses of arsenic and germanium with antimony and selenium can be prepared in large sizes for optical purposes. The elastic behaviour of eight compositions of each glass has been studied down to 4.2 K using a 10 MHz ultrasonic pulse echo interferometer. The glasses have a normal elastic behaviour, with the velocities gradually increasing as the temperature is lowered. An anharmonic solid made1 of Lakkad satisfactorily explains the temperature variations. The elastic moduli of $Ge_xSb_{10}Se_{90-x}$, glasses increase linearly as the Ge content is increased up to 25 at. % and beyond this the increase is nonlinear. $(AsSb)_{40}Se_{60}$ glasses show a linear increase in elastic moduli with increasing Sb content. The elastic moduli of $As_xSb_{15}Se_{85-x}$, glasses exhibit a drastic change near the stoichiometric composition $As_{25}Sb_{15}Se_{60}$. These behaviours have been qualitatively explained on the basis of the structural cRanges in glasses.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Keywords: Elastic behaviour;As-Sb-Se glasses;Ge-Sb-Se glasses;low temperature elasticity
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 02 Jul 2008
Last Modified: 19 Sep 2010 04:46
URI: http://eprints.iisc.ernet.in/id/eprint/14485

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