Abstract
The ionic motion in superionic conductors, Ag 2 S, Ag 2 Se and Ag 2 SI was investigated by the γ-γ perturbed angular correlations (PAC) of 111 Cd. Based on the jump diffusion model, the jump time of Ag + ions was deduced from the relaxation rate of PAC. The obtained jump time was found to be 2–150 ps and to increase in order of Ag 2 S, Ag 2 Se and Ag 2 SI. The Arrhenius plot of the jump time gives almost the same activation energy as that for the diffusion constant. This indicates the flight path remains unchanged in the measured temperature range.
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