Phonon Raman scattering of perovskite LaNiO3 thin films

被引：63
作者：
Chaban, N. [1 ]
Weber, M. [1 ]
Pignard, S. [1 ]
Kreisel, J. [1 ]
机构：
[1] Grenoble Inst Technol, CNRS, Mat & Genie Phys Lab, F-38016 Grenoble, France
来源：
APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 03期
关键词：
distortion; lanthanum compounds; phonons; Raman spectra; soft modes; thin films; vibrational modes; PHASE-TRANSITIONS; RARE-EARTH; SPECTROSCOPY; MULTILAYERS; SPECTRA; LAALO3; LAMNO3;
D O I：
10.1063/1.3464958
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report an investigation of perovskite-type LaNiO3 thin films by Raman scattering in both various scattering configurations and as a function of temperature. The room-temperature Raman spectra and the associated phonon mode assignment provide reference data for phonon calculations and for the use of Raman scattering for structural investigations of LaNiO3, namely, the effect of strain in thin films or heterostructures. The temperature-dependent Raman spectra from 80 to 900 K are characterized by the softening of the rotational A(1g) mode, which suggests a decreasing rhombohedral distortion toward the ideal cubic structure with increasing temperature. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3464958]
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页数：3
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