Crystal structure and high temperature Raman spectroscopy of Sr2ZnTeO6 double perovskite

被引：8

作者：

Manoun, Bouchaib ^{[1
,2
]}

Tamraoui, Y. ^{[1
,2
]}

Saadoune, I. ^{[2
,3
]}

Lazor, P. ^{[4
]}

Yang, W. ^{[5
]}

Alami, J. ^{[2
]}

机构：

[1] Univ Hassan 1Er, Lab Sci Mat Milieux & Modelisat LS3M, Khouribga 25000, Morocco

[2] Univ Mohamed VI Polytech, Mat Sci & Nanoengn Dept, Lot 660 Hay Moulay Rachid, Benguerir 43150, Morocco

[3] Univ Cadi Ayyad, FST Marrakech, LCME, Av A Khattabi, Marrakech 40000, Morocco

[4] Uppsala Univ, Dept Earth Sci, SE-75236 Uppsala, Sweden

[5] Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China

来源：

MATERIALS RESEARCH EXPRESS | 2017年 / 4卷 / 10期

基金：

瑞典研究理事会;

关键词：

double perovskite; phase transition; Raman spectroscopy; Sr2ZnTeO6; MICROWAVE DIELECTRIC-PROPERTIES; POWDER DIFFRACTION; HIGH-PRESSURE; CERAMICS;

D O I：

10.1088/2053-1591/aa8d87

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Sr2ZnTeO6 double-perovskite oxide has been synthesized using solid state chemistry. As synthesized, the crystalline structure of Sr2ZnTeO6, refined using x-ray diffraction, is monoclinic having the space group I2/m. Structural phase transitions are studied using Raman spectroscopy in the temperature range 25 degrees C-567 degrees C. It is found that two of three observed bending Raman vibrations merge together at a temperature of around 120 degrees C, indicating a Sr2ZnTeO6 phase transition from the monoclinic (I2/m) to the tetragonal (I4/m). Furthermore, a temperature-dependence change-rate of external and O-Te-O bending modes and stretching modes are detected at 270 degrees C, which is interpreted as a phase transition from the tetragonal (I4/m) to the cubic (Fm-3m) structure.

引用

页数：7

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