Conductivity relaxation was reported in fast ion conducting glasses in the system, xAgI–(1-x)(0.40Ag2O–0.60TeO2), at 128 to 303K and at 10Hz to 2MHz. It was observed that the relaxation could be described by the highly non-exponential Kohlrausch–Williams–Watts function. The Ag+ ions had to overcome the same barrier while relaxing, as well as when conducting. It was further observed that the migration of Ag+ ions in the glassy matrix was highly cooperative and that the cooperation extended as the AgI content increased.

Ionic Relaxation in AgI–Ag2O–TeO2 Glasses. D.Dutta, A.Ghosh: Journal of Physics - Condensed Matter, 2004, 16[15], 2617-24