%0 Journal Article %T Lattice dynamics of multiferroic BiFeO 3 studied by inelastic x-ray scattering %+ European Synchrotron Radiation Facility (ESRF) %+ Centre de Physiopathologie Toulouse Purpan (CPTP) %+ Institut des Nanosciences de Paris (INSP) %+ Acoustique pour les nanosciences (INSP-E3) %+ Laboratoire Matériaux et Phénomènes Quantiques (MPQ (UMR_7162)) %+ Laboratoire Nano-Magnétisme et Oxydes (LNO) %+ Université de Liège %A Borissenko, Elena %A Goffinet, Marco %A Bosak, Alexei %A Rovillain, Pauline %A Cazayous, Maximilien %A Colson, Dorothée %A Ghosez, Philippe %A Krisch, Michael %< avec comité de lecture %@ 0953-8984 %J Journal of Physics: Condensed Matter %I IOP Publishing %V 25 %N 10 %P 102201 %8 2013-03-13 %D 2013 %R 10.1088/0953-8984/25/10/102201 %Z Physics [physics]Journal articles %X 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). %G English %L cea-01478932 %U https://cea.hal.science/cea-01478932 %~ CEA %~ UNIV-PARIS7 %~ UPMC %~ UNIV-TLSE3 %~ CNRS %~ INSP %~ ALLINSP %~ INSP-E3 %~ IRAMIS-SPEC %~ UPMC_POLE_2 %~ SORBONNE-UNIVERSITE %~ SU-SCIENCES %~ UNIV-PARIS %~ UP-SCIENCES %~ MPQ %~ INFINITY %~ IRAMIS %~ GS-PHYSIQUE %~ ALLIANCE-SU %~ UNIV-UT3 %~ UT3-INP %~ UT3-TOULOUSEINP