Raman spectroscopy of single-domain multiferroic
- 23 February 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 81 (6), 064110
- https://doi.org/10.1103/physrevb.81.064110
Abstract
We report the investigation of polarized Raman spectroscopy of multiferroic bismuth ferrite from 81–273 K, using a ferroelectric/ferroelastic single-domain crystal with an as-grown pseudocubic (pc) -oriented surface, compared with thin film, grown by pulsed laser deposition. The polarized Raman spectra of the single crystal taken at different crystallographic orientations agree with the rhombohedral crystal structure with point group, whereas the thin film shows monoclinic structure, contrary to the bulklike rhombohedral and tetragonal structures reported earlier, but consistent with the recent synchrotron radiation studies. Earlier Raman scattering measurements on single crystals violated theoretical predictions. This may be due to mechanical polishing, which allows forbidden (LO) scattering [J. F. Scott, J. Chem. Phys. 48, 874 (1968); J. F. Scott, J. Chem. Phys. 49, 98 (1968)]. All of the different phonon vibrations ( and modes) in the single crystal have unambiguously been assigned.
Keywords
This publication has 33 references indexed in Scilit:
- Some symmetry aspects of ferroics and single phase multiferroics*Journal of Physics: Condensed Matter, 2008
- Structure properties of BiFeO3 films studied by micro-Raman scatteringJournal of Applied Physics, 2008
- Observation of phonons in multiferroic BiFeO3single crystals by Raman scatteringJournal of Physics: Condensed Matter, 2007
- Raman and infrared spectra of multiferroic bismuth ferrite from first principlesPhysical Review B, 2007
- Polarized Raman scattering of multiferroicthin films with pseudo-tetragonal symmetryPhysical Review B, 2005
- Epitaxial BiFeO 3 Multiferroic Thin Film HeterostructuresScience, 2003
- Raman spectrum of magneto-electric crystalsPhysica Scripta, 1992
- Structure of a ferroelectric and ferroelastic monodomain crystal of the perovskite BiFeO3Acta crystallographica Section B, Structural science, crystal engineering and materials, 1990
- The classification of tilted octahedra in perovskitesActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1972
- Dipole–Dipole Interactions in TungstatesThe Journal of Chemical Physics, 1968