Raman spectroscopic study of structural transformation in ordered double perovskites La2CoMnO6 bulk and epitaxial film

被引：13
|
作者：
Kumar, Dhirendra [1 ]
Sathe, V. G. [1 ]
机构：
[1] UGC DAE Consortium Sci Res, Indore 452001, Madhya Pradesh, India
来源：
SOLID STATE COMMUNICATIONS | 2015年 / 224卷
关键词：
LA2NIMNO6;
D O I：
10.1016/j.ssc.2015.09.014
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Raman spectra of polycrystalline bulk compound and epitaxial thin films of La2CoMnO6 grown on (001) oriented SrTiO3 substrates have been measured between 300 K and 823 K. The polarization dependence of the spectra collected on films provides clear evidence for ordered P2(1)/n structure at room temperature. The high temperature spectra showed appearance of two new modes and simultaneous disappearance of couple of modes above 523 K for bulk and above 583 K in films which is close to previously reported P2(1)/n to R-3 structural transition temperature. The structural transition is seen to accompany softening and anomalous changes in peak widths of stretching and anti-stretching modes indicating significant changes in the tilts in oxygen octahedra around the cations. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：10 / 14
页数：5
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