Abstract
We report the ionic conductivity relaxation in fast ion conducting glasses in the systemxAgI–(1−x)(0.40Ag2O–0.60TeO2) in the temperature range 128–303 K and in the frequency range 10 Hz–2 MHz.We have observed that the conductivity relaxation can be described bythe highly non-exponential Kohlrausch–Williams–Watts function. TheAg+ ions have to overcome the same barrier while relaxing as well aswhile conducting. We have further observed that the migration ofAg+ ions in the glassy matrix is highly cooperative and the cooperation is extended as the AgIcontent is increased.
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