S. Matsuo et al., QUASI-ELASTIC LIGHT-SCATTERING IN SUPERIONIC GLASSES AGI-AG2O-M0O3, Physical review. B, Condensed matter, 48(21), 1993, pp. 15651-15657
Quasielastic light scattering (QELS) due to hopping of Ag+ ions was st
udied on superionic glasses (AgI)x(Ag2OMoO3)1-x (x = 0.60,0.70,0.75).
The temperature dependence of the QELS intensity at a fixed frequency
as well as the integrated QELS intensity were measured. The activation
energy for ionic hopping did not depend on glass composition, and the
value (almost-equal-to 0. 1 eV) was close to that determined in alpha
-AgI. From these results, it was concluded that the local hopping of A
g+ ions in the region like alpha-AgI contributes to QELS. It was found
from the temperature dependence of the QELS intensity that the concen
tration of hopping ions increased with increasing temperature above 22
0 K. The increase in hopping-ion concentration may be related to a dc
conduction process.