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Title: Study of lattice dynamics in yttrium doped NdMnO{sub 3} using Raman spectroscopy

A systematic study of Raman spectra on Yttrium doped NdMnO{sub 3} polycrystalline samples was undertaken to understand the lattice dynamics in this compound. Raman active phonons were analyzed and the observed peak were assigned to elucidate various phonon modes in the range (200 - 800) cm{sup −1}. It was observed that at 325 cm{sup −1} phonon frequency shifts upward as much as upto 4 % with increase in Yttrium content. Lattice distortions manifest themselves by frequency shifts in both bending and tilt modes of MnO{sub 6} octahedra, resulting in increase of Raman band line-widths.
Authors:
;  [1] ;  [2]
  1. Physics Department, Indian Institute of Science, Bangalore-560012 (India)
  2. Physics Department, Indian Institute of Science, Bangalore-560012, India and JCNS/ PGI, JARA-FIT, Forschungszentrum Jülich GmbH52425 Jülich (Germany)
Publication Date:
OSTI Identifier:
22269363
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1591; Journal Issue: 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DOPED MATERIALS; MANGANESE OXIDES; PHONONS; POLYCRYSTALS; RAMAN SPECTRA; RAMAN SPECTROSCOPY; YTTRIUM