Abstract
We have grown BiFeO3 bulk single crystals by a flux method and characterized the phononspectra in detail by Raman scattering in the temperature range 4–1100 K.All the 13 Raman-active phonon modes predicted by group theory,4A1+9E, were observed at low temperature and successfully assigned by a polarized Ramanmeasurement. Moreover, drastic spectral changes in the Raman spectra were observed attemperatures 600–700 K and 1000–1100 K. These features are discussed from the viewpointof phonon coupling with the magnetic ordering and the structural phase transition,respectively.
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Schedule a callMore From: Journal of physics. Condensed matter : an Institute of Physics journal
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