Origin of constant loss in ionic conductors

被引：218

作者：

León, C ^{[1
]}

Rivera, A

Várez, A

Sanz, J

Santamaria, J

Ngai, KL

机构：

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

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

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

[4] USN, Res Lab, Washington, DC 20375 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.86.1279

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have analyzed the constant loss contribution to the ac conductivity in the frequency range 10 Hz-1 MHz and temperatures down to 8 K, for two Li ionic conductors, one crystalline (Li0.18La0.61TiO3) and the other glassy (61SiO(2). 35Li(2)O . 3Al(2)O(3).P2O5). As temperature is increased a crossover is observed from a nearly constant loss to a fractional power law frequency dependence of the ac conductivity. At any fixed frequency omega, this crossover occurs at a temperature T such that omega approximate to nu (0) exp(-E-m/k(B)T), where nu (0) is the attempt frequency and E-m is identified with the barrier for Li+ ions to leave their wells.

引用

页码：1279 / 1282

页数：4

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