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Activation barriers for d.c. conductivity in ionic glasses: Classical calculations using the small-cluster approximation

Rao, KJ and Estournes, C and Levasseur, A and Shastry, MCR and Menetrier, M (1993) Activation barriers for d.c. conductivity in ionic glasses: Classical calculations using the small-cluster approximation. In: Philosophical Magazine Part B: Physics of Condensed Matter. Electronics, Optical and Magnetic Properties, 67 (3). pp. 389-406.

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Abstract

A small-cluster approximation has been used to calculate the activation barriers for the d.c. conductivity in ionic glasses. The main emphasis of this approach is on the importance of the hitherto ignored polarization energy contribution to the total activation energy. For the first time it has been demonstrated that the d.c. conductivity activation energy can be calculated by considering ionic migration to a neighbouring vacancy in a smali cluster of ions consisting of face-sharing anion polyhedra. The activation energies from the model calculations have been compared with the experimental values in the case of highly modified lithium thioborate glasses.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 31 Jan 2011 13:29
Last Modified: 31 Jan 2011 13:29
URI: http://eprints.iisc.ernet.in/id/eprint/35272

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