Direct Measurement of the Attempt Frequency for Ion Diffusion in Ag and Naβ-Alumina

Abstract

The attempt frequency for ion diffusion in the superionic conductors sodium and silver $\beta$-alumina is directly observed as a resonance in the far infrared dielectric response. Correlation of the measured attempt frequency with the observed diffusion coefficient suggests that the best conductors, Na and Ag $\beta$-alumina, can be described by a single ion hopping motion despite the relatively high density of diffusing species.