Lattice dynamics of multiferroic BiFeO 3 studied by inelastic x-ray scattering

Elena Borissenko 1 Marco Goffinet 2 Alexei Bosak 1 Pauline Rovillain 3, 4 Maximilien Cazayous 5 Dorothée Colson 6 Philippe Ghosez 7 Michael Krisch 1
1 ESRF - European Synchrotron Radiation Facility
2 Centre de Physiopathologie Toulouse Purpan (ex IFR 30 et IFR 150)
3 INSP - Institut des Nanosciences de Paris
4 INSP-E3 - Acoustique pour les nanosciences
INSP - Institut des Nanosciences de Paris
5 MPQ - Matériaux et Phénomènes Quantiques
6 LNO - Laboratoire Nano-Magnétisme et Oxydes
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
7 Université de Liège
Abstract : We report an experimental study of the phonon dispersion in BiFeO(3) single crystals at ambient conditions by inelastic x-ray scattering (IXS). The phonon dispersions were recorded along several symmetry directions up to 35 meV. Our results compare favorably with first-principles calculations performed using density functional theory (DFT) within the local-density approximation (LDA). We resolve a discrepancy concerning the symmetry of the optical phonon branches observed by Raman spectroscopy, determine the energy of the lowest Raman and infrared silent mode, and derive a subset of the elastic moduli of BiFeO(3).
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Article dans une revue
Journal of Physics: Condensed Matter, IOP Publishing, 2013, 25 (10), pp.102201 〈10.1088/0953-8984/25/10/102201〉
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https://hal-cea.archives-ouvertes.fr/cea-01478932
Contributeur : Dominique Girard <>
Soumis le : mardi 28 février 2017 - 14:52:50
Dernière modification le : mardi 11 septembre 2018 - 15:18:46

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CEA | UNIV-TLSE3 | ALLINSP | UPMC | DSM-IRAMIS | INSP | IRAMIS-SPEC | INSP-E3 | USPC | CEA-DRF

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Elena Borissenko, Marco Goffinet, Alexei Bosak, Pauline Rovillain, Maximilien Cazayous, et al.. Lattice dynamics of multiferroic BiFeO 3 studied by inelastic x-ray scattering. Journal of Physics: Condensed Matter, IOP Publishing, 2013, 25 (10), pp.102201 〈10.1088/0953-8984/25/10/102201〉. 〈cea-01478932〉

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