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High-Pressure Studies Of SE100-XTEX Glasses

Parthasarathy, G and Rao, KJ and Gopal, ESR (1984) High-Pressure Studies Of SE100-XTEX Glasses. In: Philosophical magazine b-physics of condensed matter statistical mechanics electronic optical and magnetic properties, 50 (3). pp. 335-346.

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Abstract

High pressure resistivity measurements on Se100-xTex, glasses for 0≤x≤30 are reported. Two composition regions, where the transport and transformation behaviour are different, are identified. For 0≤x≤6, there is a first-order-like transformation to metallic crystalline states, while for x>6 the transformation appears to be continuous. Glass-transition temperatures also show differences in trends as a function of composition around 6% Te. An attempt is made to explain the composition-dependent trends on the basis of known structural features of selenium glasses and of the nature of tellurium bonding. At concentrations with up to 6% tellurium, Te most likely enters selenium chain terminations, substituting for negatively charged Se1- defects, while at larger concentrations, tellurium probably enters chains and rings by a random substitution.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Taylor and Francis Group.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 12 Aug 2009 05:52
Last Modified: 12 Aug 2009 05:52
URI: http://eprints.iisc.ernet.in/id/eprint/20630

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