Phase transitions in Rb2KLuF6 crystal

被引：0
|
作者：
Krylov, A. S. [1 ]
Vtyurin, A. N. [1 ]
Voronov, V. N. [1 ]
Krylova, S. N. [1 ]
机构：
[1] Kirensky Inst Phys FRC KSC SB RAS, Krasnoyarsk, Russia
来源：
FERROELECTRICS | 2019年 / 538卷 / 01期
基金：
俄罗斯基础研究基金会;
关键词：
Temperature; Raman spectroscopy; elpasolite; phase transition; RAMAN-SCATTERING; LUMINESCENCE; ELPASOLITES; FLUORIDES; RB2KINF6;
D O I：
10.1080/00150193.2019.1569982
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Raman spectra of Rb2KLuF6 elpasolite crystal have been studied in a wide temperature range, including two phase transitions: from the cubic phase to the tetragonal phase and then to the monoclinic phase. The results of an analysis of the temperature dependences of the parameters of spectral lines are in good agreement with the thermodynamic data on the phase transitions. The analysis of Raman spectra shows that the transition from cubic to tetragonal phase is a second-order transition and the transition from the tetragonal to the monoclinic phase is a weak first-order transition.
引用
收藏
页码：28 / 34
页数：7
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