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

0359003 - FZÚ 2012 RIV US eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR GAP204/10/0616
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: BiFeO₃ * Raman scattering * phonon modes * multiferroic
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.691, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0196885