NON-ARRHENIUS CONDUCTIVITY IN THE FAST IONIC CONDUCTOR LI0.05LA0.5TIO3 - RECONCILING SPIN-LATTICE AND ELECTRICAL-CONDUCTIVITY RELAXATIONS

Authors
LEON C SANTAMARIA J PARIS MA SANZ J IBARRA J TORRES LM
Citation
C. Leon et al., NON-ARRHENIUS CONDUCTIVITY IN THE FAST IONIC CONDUCTOR LI0.05LA0.5TIO3 - RECONCILING SPIN-LATTICE AND ELECTRICAL-CONDUCTIVITY RELAXATIONS, Physical review. B, Condensed matter, 56(9), 1997, pp. 5302-5305
Citations number
26
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
56
Issue
9
Year of publication
1997
Pages
5302 - 5305
Database
ISI
SICI code
0163-1829(1997)56:9<5302:NCITFI>2.0.ZU;2-8
Abstract
Nuclear magnetic resonance and electrical conductivity measurements ar e conducted to study the dynamics of the ionic diffusion process in th e crystalline ionic conductor Li0.5La0.5TiO3 dc conductivity shows a n on-Arrhenius temperature dependence, similar to the one recently repor ted for some ionic conducting glasses. Spin-lattice and conductivity r elaxations are analyzed in the same frequency and temperature range in terms of the non-Arrhenius dependence of the correlation time. Both r elaxations are then described using a single correlation function of t he form f(t)=exp(-(t/tau)(beta)), with beta=0.4 over the whole tempera ture range.