Abstract
A new quaternary selenovanadate glassy AgIAg 2O[ XSeO 2(1 − X)V 2O 5] is prepared and the glass forming regions are determined. An enhancement in conductivity of about one order of magnitude is obtained on adding SeO 2 glass former to the ternary glassy system AgIAg 2OV 2O 5. The results of measurements of a.c. conductivity and dielectric modulus of the glassy system over wide ranges of frequency and temperature are reported. Jonscher's dielectric “universal response” formalism is applied to discuss the observed power law dependence of a.c. conductivity. The conductivity relaxation time τ and the power law exponent n are calculated using the relation σ( ω) = σ(o)[1 + ( ωτ) n ] and the results are discussed.
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