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

Gopal, E. S. R. ; Mukundan, T. S. ; Philip, J. ; Sathish, S. (1987) Low temperature elastic behaviour of As-Sb-Se and Ge-Sb-Se glasses Pramana - Journal of Physics, 28 (5). pp. 471-482. ISSN 0304-4289

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Official URL: http://www.ias.ac.in/j_archive/pramana/28/5/471-48...

Related URL: http://dx.doi.org/10.1007/BF03026684


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 model of Lakkad satisfactorily explains the temperature variations. The elastic moduli of Ge xSb10Se90-x glasses increase linearly as the Ge content is increased up to 25 at. % and beyond this the increase is nonlinear. (AsSb)40Se60 glasses show a linear increase in elastic moduli with increasing Sb content. The elastic moduli of AsxSb15Se85-x glasses exhibit a drastic change near the stoichiometric composition As25Sb15Se60. These behaviours have been qualitatively explained on the basis of the structural changes in glasses.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Elastic Behaviour; As-Sb-Se Glasses; Ge-Sb-Se Glasses; Low Temperature Elasticity
ID Code:71034
Deposited On:24 Nov 2011 03:54
Last Modified:18 May 2016 16:55

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