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

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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https://hal-cea.archives-ouvertes.fr/cea-01478932
Contributor : Dominique Girard <>
Submitted on : Tuesday, February 28, 2017 - 2:52:50 PM
Last modification on : Friday, April 10, 2020 - 5:14:39 PM

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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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