Ferroelastic phase transitions in Rb2KM3+F6 elpasolites

被引：13

作者：

Flerov, IN ^{[1
]}

Gorev, MV

Tressaud, A

Grannec, J

机构：

[1] LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

[2] Inst Chim Mat Condensee Bordeaux, F-33608 Pessac, France

来源：

FERROELECTRICS | 1998年 / 217卷 / 1-4期

基金：

俄罗斯基础研究基金会;

关键词：

phase transition; ferroelastics; structure; thermodynamic properties;

D O I：

10.1080/00150199808015018

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of M3 + ion substitution on the physical properties of Rb2KM3 + F-6 (M3 + = Ga, Fe, Sc, In, Lu, Er, Ho, Tb) series with elpasolite structure was studied by DTA under hydrostatic pressure, calorimetric, X-ray, elastic and inelastic neutron scattering measurements. There exists a strong dependence of both type and succession of ferroelastic phase transitions on the M3 + ion size. Hydrostatic pressure effect was found partially inconsistent with chemical pressure. Possible models of phase transition mechanism were considered. It was supposed that anharmonic F atom vibrations could play a great role in phase transitions of the series.

引用

页码：21 / 33

页数：13

共 35 条

[21]

GOREV MV, 1993, FIZ TVERD TELA+, V35, P1022

[22] Effect of Sc substitution and pressure on phase transition in Rb2KGaF6 elpasolite. [J].