Non-Debye conductivity relaxation in the non-Arrhenius Li0.5La0.5TiO3 fast ionic conductor.: A nuclear magnetic resonance and complex impedance study

被引：38

作者：

Leon, C

Santamaria, J

Paris, MA

Sanz, J

Ibarra, J

Varez, A

机构：

[1] Univ Complutense Madrid, Fac Ciencias Fis, Dept Fis Aplicada 3, E-28040 Madrid, Spain

[2] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain

[3] Univ Autonoma Nuevo Leon, Div Estudios Super CIDEMAC, Monterrey, Nuevo Leon, Mexico

[4] Univ Carlos III Madrid, Escuela Politecn Super, Dept Ingn, Leganes 28911, Spain

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1998年 / 235卷

关键词：

D O I：

10.1016/S0022-3093(98)00626-7

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An analysis of electrical conductivity relaxation and nuclear magnetic resonance spin-lattice relaxation has been conducted to study the dynamics of the ionic diffusion process in the crystalline ionic conductor Li0.5La0.5TiO3. Dc conductivity shows a non-Arrhenius temperature dependence, similar to the one recently reported for some ionic conducting glasses. Taking into account this non-Arrhenius dependence for the relaxation times, spin-lattice and conductivity relaxations are compared in the same frequency and temperature ranges. A single "stretched exponential" relaxation function of the form f(t) = exp(-(t/tau)(beta)), with beta = 0.4, can be used to describe both relaxation processes in which correlation times differ in the preexponential factor. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：753 / 760

页数：8

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