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Photoacoustic investigation of the optical absorption and thermal diffusivity in SixTe100−x glassesstar

Madhusoodanan, KN and Jacob, Philip and Asokan, S and Parthasarathy, G and Gopal, ESR (1989) Photoacoustic investigation of the optical absorption and thermal diffusivity in SixTe100−x glassesstar. In: Journal of Non-Crystalline Solids, 109 (2-3). pp. 255-261.

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Official URL: http://dx.doi.org/10.1016/0022-3093(89)90037-9

Abstract

The photoacoustic technique is used to determine the optical energy gap E0 of bulk SixTe100−x glasses in the glass-forming region 10 ≤ x ≤ 28. The thermal diffusivity α of these samples has also been measured. The variation of E0 and α with x is reported. It is found that E0 increases with x nearly linearly with a sharp decrease in the rate of increase beyond x = 20. The thermal diffusivity also increases with x up to x = 20 but decreases for compositions with higher values of x. The observed behaviour is explained on the basis of a chemical bond approach. It is accounted for in terms of the increase in the number of Te---Te bonds and formation of SiTe4 tetrahedra with an increase in the chalcogen content.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation and Applied Physics (Formally ISU)
Date Deposited: 13 Aug 2010 09:26
Last Modified: 19 Sep 2010 06:14
URI: http://eprints.iisc.ernet.in/id/eprint/31271

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