Raman spectroscopy of single-domain multiferroic BiFeO3

R. Palai*, H. Schmid, J. F. Scott, R. S. Katiyar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

109 Citations (Scopus)

Abstract

We report the investigation of polarized Raman spectroscopy of multiferroic bismuth ferrite (BiFeO3) from 81-273 K, using a ferroelectric/ferroelastic single-domain crystal with an as-grown pseudocubic (pc) (100)(pc)-oriented surface, compared with (001)(pc) 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 C-3v point group, whereas the (001)(pc) 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 E (LO) scattering [J.F. Scott, J. Chem. Phys. 48, 874 (1968); 49, 98 (1968)]. All of the different phonon vibrations (A(1) and E modes) in the single crystal have unambiguously been assigned.

Original languageEnglish
Article number064110
Number of pages7
JournalPhysical Review. B, Condensed matter and materials physics
Volume81
Issue number6
DOIs
Publication statusPublished - Feb 2010

Keywords

  • PEROVSKITE BIFEO3
  • CRYSTALS
  • SCATTERING

Fingerprint

Dive into the research topics of 'Raman spectroscopy of single-domain multiferroic BiFeO3'. Together they form a unique fingerprint.

Cite this