Showing papers by "Colin A. Vincent published in 1982"
TL;DR: In this article, it is suggested that the curvature in conductivity of Ag7I4AsO4 glasses arises from a coupling between the motion of the mobile silver ions, and temperature-dependent local structural changes in the glass.
Abstract: Rapidly quenched Ag7I4AsO4 glasses show an abnormal curvature in conductivity Arrhenius plots (log σT versus 1/T) in the region below the glass transition temperature. This curvature decreases progressively as the fictive temperature is lowered by annealing for extended periods below Tg, and ultimately “normal” linear behavior is observed when the annealing is carried out at a sufficiently low temperature. It is suggested that the curvature, which implies a temperature-dependent activation energy for the ionic motion, arises from a coupling between the motion of the mobile silver ions, and temperature-dependent local structural changes in the glass.
40 citations