Angular dispersion of oblique phonon modes in BiFeO.sub.3./sub. from micro-Raman scattering

0359003 - FZÚ 2012 RIV US eng J - Journal Article
Hlinka, Jiří - Pokorný, Jan - Karimi, S. - Reaney, I. M.
Angular dispersion of oblique phonon modes in BiFeO₃ from micro-Raman scattering.
Physical Review. B. Roč. 83, č. 2 (2011), "020101-1"-"020101-4". ISSN 1098-0121
R&D Projects: GA ČR GAP204/10/0616
Institutional research plan: CEZ:AV0Z10100520
Keywords : BiFeO₃ * Raman scattering * phonon modes * multiferroic
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 3.691, year: 2011
http://link.aps.org/doi/10.1103/PhysRevB.83.020101

The angular dispersion of oblique phonon modes in a multiferroic BiFeO3 has been obtained from a micro-Raman spectroscopic investigation of a coarse grain ceramic sample. Continuity of the measured angular dispersion curves allows conclusive identification of all pure zone-center polar modes. The metod employed here to reconstruct the anisotropic crystal property from a large set of independent local measurements on a macroscopically isotropic ceramic sample profits from the censiderable dispersion of the oblique modes in ferroelectric perovskites and it can be in principle conveniently applied to any other optically uniaxial ferroelectric material.
Permanent Link: http://hdl.handle.net/11104/0196885