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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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
Publication:	Journal of Non-Crystalline Solids
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	13 Aug 2010 09:26
Last Modified:	19 Sep 2010 06:14
URI:	http://eprints.iisc.ac.in/id/eprint/31271

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