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Relaxation studies; V₂O₅-TeO₂; heterogeneous conductor model

The dielectric modulus spectra of glasses in the system V₂O₅-TeO₂ have been studied as a function of frequency in the temperature range 230 to 330K. A heterogeneous conductor model developed recently with the assumption of a sinusoidally varying local conductivity in the conducting phase has been successfully applied to analyse the data in this glass system. The Kohlrausch-Williams-Watts (KWW) stretched exponential function has also been used to fit the measured modulus spectra. The exponentβ is found to be correlated to the conductivity fluctuation in the conducting phase as assumed in the heterogeneous model.

M Pal¹ S K Saha^{1 2} D Chakravorty¹

1. Indian Association for the Cultivation of Science, Jadavpur, Calcutta - 700 032, India
2. Durgapur Government College, Durgapur - 713 214, India

Published

August 1994

Manuscript received

16 April 1994