ION CONDUCTION IN BETA-AGI SINGLE-CRYSTAL AT LOW-TEMPERATURES

Silver ion conduction in beta-AgI single crystal along a c-axis was st udied by impedance spectroscopy in the temperature range between 26-36 0 K. Anomalies were observed at similar to 40 and similar to 200 K in the data of the real part of the complex conductivity and at similar t o 200 K in the imaginary part. Data analysis shows that the frequency- dependent complex conductivity in the frequency range below similar to 160 K and above similar to 220 K can be interpreted well by the Berna sconi's random barrier model, Through the temperature range between si milar to 160 K and similar to 220 K, ordering of Frenkel defects may o ccur above similar to 220 K.