AC CONDUCTIVITY AND ELECTRIC MODULUS BEHAVIOR OF THE VITREOUS SYSTEM AGI-AG2O-[XSEO2-(1-X)V2O5]

A new quaternary selenovanadate glassy AgI-Ag2O-[XSeO2-(1 - X)V2O5] is prepared and the glass forming regions are determined. An enhancement in conductivity of about one order of magnitude is obtained on adding SeO2 glass former to the ternary glassy system AgI-Ag2O-V2O5. 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 tau and the power law exponent n are calculated using the relation sigma(omega) = sigma(o)[1+(omegatau)n] and the results are discussed.