Non-Arrhenius conductivity in the fast ionic conductor Li0.05La0.5TiO3: Reconciling spin-lattice and electrical-conductivity relaxations

被引:92
作者
Leon, C
Santamaria, J
Paris, MA
Sanz, J
Ibarra, J
Torres, LM
机构
[1] CSIC,INST CIENCIA MAT,E-28049 MADRID,SPAIN
[2] UNIV AUTONOMA NUEVO LEON,CIDEMAC,DIV ESTUD SUPER,MONTERREY,NUEVO LEON,MEXICO
来源
PHYSICAL REVIEW B | 1997年 / 56卷 / 09期
关键词
D O I
10.1103/PhysRevB.56.5302
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Nuclear magnetic resonance and electrical conductivity measurements are 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. Spin-lattice and conductivity relaxations are analyzed in the same frequency and temperature range in terms of the non-Arrhenius dependence of the correlation time. Both relaxations are then described using a single correlation function of the form f(t)=exp(-(t/tau)(beta)), with beta=0.4 over the whole temperature range.
引用
收藏
页码:5302 / 5305
页数:4
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