THERMALLY-INDUCED LITHIUM DISORDER IN LI3FE2(PO4)3

被引：11

作者：

SIGARYOV, SE

TERZIEV, VG

机构：

[1] Institute of Crystallography, Russian Academy of Sciences, Moscow 117333

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.48.16252

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A gradual increase of disorder with temperature in the lithium subsystem is observed for the superionic conductor Li3Fe2(PO4)3 for a rise from 470 K to 820 K. Structural phase transitions occurring in this temperature interval result in a continuous way in changes of the activation energy of the disordering. It differs from the abrupt disordering of the conductive ion subsystem in the vicinity of the structural phase transition, which is the usual case for the superionics. This behavior is explained within a two-level phenomenological model that assumes weak ion-ion interaction in the lithium subsystem and a population of the excited state due only to the temperature increase.

引用

页码：16252 / 16255

页数：4

共 13 条

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