STUDY OF LOW-FREQUENCY EXCITATIONS IN DISORDERED SOLIDS BY NUCLEAR-MAGNETIC-RESONANCE AND ELECTRICAL-CONDUCTIVITY

Authors
KANERT O KUCHLER R DIECKHOFER J LU X JAIN H NGAI KL
Citation
O. Kanert et al., STUDY OF LOW-FREQUENCY EXCITATIONS IN DISORDERED SOLIDS BY NUCLEAR-MAGNETIC-RESONANCE AND ELECTRICAL-CONDUCTIVITY, Journal of non-crystalline solids, 172, 1994, pp. 1277-1284
Citations number
22
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of non-crystalline solids → ACNP
ISSN journal
00223093
Volume
172
Year of publication
1994
Part
2
Pages
1277 - 1284
Database
ISI
SICI code
0022-3093(1994)172:<1277:SOLEID>2.0.ZU;2-C
Abstract
Nuclear spin relaxation (NSR) and electrical conductivity observed in various inorganic oxide glasses at low temperatures are found to be re lated by the fluctuation-dissipation theorem indicating a common physi cal origin of the relaxation mechanism due to fluctuating charges whic h belong to structural low-energy configurations intrinsic to the glas sy state. However, in heavy metal fluoride glasses, NSR is shown to de tect additional fluctuations which are not observed by conductivity ex periments. The underlying relaxation process is caused by magnetic flu ctuations without any accompanying charge motions.