QUASI-ELASTIC LIGHT-SCATTERING IN SUPERIONIC GLASSES AGI-AG2O-M0O3

Citation
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
Citations number
22
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
01631829
Volume
48
Issue
21
Year of publication
1993
Pages
15651 - 15657
Database
ISI
SICI code
0163-1829(1993)48:21<15651:QLISGA>2.0.ZU;2-7
Abstract
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.