AN X-RAY-SCATTERING STUDY OF THE LOW-TEMPERATURE PHASE-TRANSITIONS OF LIKSO4

被引：11

作者：

DESERT, A ^{[1
]}

GIBAUD, A ^{[1
]}

RIGHI, A ^{[1
]}

LEITAO, UA ^{[1
]}

MOREIRA, RL ^{[1
]}

机构：

[1] UNIV FED MINAS GERAIS, ICEX, DEPT FIS, BR-30161970 BELO HORIZONTE, MG, BRAZIL

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1995年 / 7卷 / 44期

关键词：

D O I：

10.1088/0953-8984/7/44/013

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

X-ray diffraction studies on solution-grown LiKSO4 have been performed between 70 K and 300 K. The lattice parameters have been obtained as a function of the temperature. The hexagonal to trigonal phase transition at 205 K is seen by a slight increase of the c lattice parameter, while the ferroelastic transition at 182 K is accompanied by the appearance of an important spontaneous elastic deformation. The deformation and the domain pattern are analysed via a 'squeezing' model of the hexagonal lattice which leads to a monoclinic lattice below T-c = 182 K.

引用

页码：8445 / 8452

页数：8

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