The electrical conductivity of the (AgI)1 - x(Ag2MoO4)x system (x = 0.2, 0.25, 0.3) was measured in both the liquid and the glassy state. The temperature dependence of the observed dc conductivity in the liquid state is well expressed by the Vogel-Tumman-Fulcher (VTF) equation, while in the glassy state it is described by the Arrhenius law. In particular, an abrupt change in the temperature derivative of the conductivity was found at the glass transition temperature Tg. the value of which was independently determined by thermal analysis. The frequency dependence of the conductivity in the glassy state was found only at temperatures far below Tg, which may be due to the decrease in the transition rate of conducting Ag+ cations. The structural relaxation of glasses appears to yield anomalous behavior of the conductivity near Tg, such as deviations from the Arrhenius law, annealing and hysteresis effects.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry