Investigation of Raman and infrared modes for Sr doped double perovskite oxides Ba2-xSrxMWO6 (M=Ni, Co); for 0 ≤ x ≤ 1.2

被引：6

作者：

Garg, Shaveen ^{[1
]}

Sinha, M. M. ^{[1
]}

Gupta, H. C. ^{[2
]}

机构：

[1] St Longowal Inst Engn & Technol, Dept Phys, Sangrur 148106, Punjab, India

[2] Indian Inst Technol, Dept Phys, New Delhi 110016, India

来源：

PHYSICA B-CONDENSED MATTER | 2014年 / 433卷

关键词：

Lattice dynamics; Double perovskite oxides; Infrared spectra; Raman spectra; Symmetry coordinates; Zone centre phonons; PHASE-TRANSITIONS; CRYSTAL-GROWTH; SR2CAWO6; RESONATORS; CERAMICS; FILTERS; NI;

D O I：

10.1016/j.physb.2013.10.013

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A short-range force constant model has been applied to investigate the Raman and infrared modes in Sr doped ordered double perovskite oxides Ba2-xSrxMWO6 (M=CO, Ni); for 0 <= x <= 1.2 (cubic phase) using normal coordinate analysis based on the G-F matrix method. In the present work, calculations on zone centre phonons have been made with three stretching and two bending force constants in its cubic phase (space group: Fm-3m) only. The calculated Raman wave numbers are in well agreement with the available experimental results. The infrared modes are calculated and proposed for the first time. The significant contribution of each force constant towards every Raman and the infrared wave numbers has also been determined by investigating the potential energy distribution. (C) 2013 Elsevier B.V. All rights reserved

引用

页码：107 / 111

页数：5

共 7 条

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