Article (Scientific journals)
Single-crystalline BiMnO3 studied by temperature-dependent x-ray diffraction and Raman spectroscopy
Toulemonde, P.; Bordet, P.; Bouvier, P. et al.
2014In Physical Review. B, 89 (22)
Peer reviewed
 

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Abstract :
[en] We report on the temperature dependence of the phonons and crystallographic parameters in BiMnO3 single crystals grown under high pressure and high temperature. The crystallographic structure of the sample was refined from room temperature to liquid helium temperature in the centrosymmetric C2/c space group, i.e., a group which does not allow ferroelectricity. In addition, the lattice dynamics was probed by Raman spectroscopy down to liquid nitrogen temperature, i.e., below the ferromagnetic transition at TC = 100 ± 2 K. Both crystallographic and Raman data indicate the absence of a structural phase transition at the ferromagnetic ordering or any other temperature. The Raman signature around TC shows a significant spin-phonon coupling for the high-frequency bands.
Disciplines :
Physics
Author, co-author :
Toulemonde, P.;  Université Grenoble Alpes, France > Institut Néel ; CNRS, Grenoble, France > Institut Néel
Bordet, P.;  Université Grenoble Alpes, France > Institut Néel ; CNRS, Grenoble, France > Institut Néel
Bouvier, P.;  CNRS, Grenoble Institute of Technology, France > Laboratoire des Matériaux et du Génie Physique
Kreisel, Jens ;  University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit ; CRP Gabriel Lippmann, Belvaux, Luxembourg > Département Science et Analyse des Matériaux
External co-authors :
yes
Language :
English
Title :
Single-crystalline BiMnO3 studied by temperature-dependent x-ray diffraction and Raman spectroscopy
Publication date :
2014
Journal title :
Physical Review. B
ISSN :
1098-0121
Volume :
89
Issue :
22
Peer reviewed :
Peer reviewed
Commentary :
Times Cited: 0 Kreisel, Jens/E-1939-2011 0 Journal Article
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