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
收藏
页码：21 / 33
页数：13
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