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Raman spectroscopy on cubic and hexagonal SrMnO 3
Author(s) -
Sacchetti A.,
Baldini M.,
Postorino P.,
Martin C.,
Maignan A.
Publication year - 2006
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1484
Subject(s) - raman spectroscopy , phonon , crystallite , hexagonal crystal system , chemistry , crystallography , spectral line , spectroscopy , analytical chemistry (journal) , materials science , condensed matter physics , optics , physics , organic chemistry , quantum mechanics , astronomy
We report on the first optical characterization of both cubic and hexagonal SrMnO 3 . Room‐temperature Raman spectra collected by means of a micro‐Raman spectrometer are shown. The spectrum of the cubic compound is characterized by weak and broad bands in agreement with group theory which predicts no Raman‐active phonons for this compound. On the other hand, the spectrum of the hexagonal compound shows six narrow peaks ascribed to one‐phonon processes. A complete polarization analysis of the spectra collected from a single crystallite allows us to completely assign the symmetries of the six observed peaks. Atomic displacements for all phonon peaks are also proposed. Copyright © 2006 John Wiley & Sons, Ltd.