NON-ARRHENIUS CONDUCTIVITY IN GLASSY AND CRYSTALLIZED FAST-ION CONDUCTORS - A MANIFESTATION OF CATIONIC DISORDER

Authors
RIBES M TAILLADES G PRADEL A
Citation
M. Ribes et al., NON-ARRHENIUS CONDUCTIVITY IN GLASSY AND CRYSTALLIZED FAST-ION CONDUCTORS - A MANIFESTATION OF CATIONIC DISORDER, Solid state ionics, 105(1-4), 1998, pp. 159-165
Citations number
17
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical
Journal title
Solid state ionics → ACNP
ISSN journal
01672738
Volume
105
Issue
1-4
Year of publication
1998
Pages
159 - 165
Database
ISI
SICI code
0167-2738(1998)105:1-4<159:NCIGAC>2.0.ZU;2-#
Abstract
A non-Arrhenius variation of conductivity below T-g is shown to exist in the fast ion conducting glass 0.5Ag(2)S-0.5GeS(2). Such a behaviour appears to be a characteristic of fast ion conductors, either crystal lized (CFIC) or glassy (GFIC). The empirical Vogel-Fulcher-Tammann law is used to account for conductivity variations in all these materials . This behaviour is probably the manifestation of the configurational entropy associated with the cation disordering which is a common chara cteristic to both GFIC and CFIC.