Physics of the Solid State

, Volume 52, Issue 4, pp 734–743

Optical properties of BiFeO3 ceramics in the frequency range 0.3–30.0 THz

Authors

  • G. A. Komandin
    • A. M. Prokhorov General Physics InstituteRussian Academy of Sciences
  • V. I. Torgashev
    • Southern Federal University
  • A. A. Volkov
    • A. M. Prokhorov General Physics InstituteRussian Academy of Sciences
    • A. M. Prokhorov General Physics InstituteRussian Academy of Sciences
  • I. E. Spektor
    • A. M. Prokhorov General Physics InstituteRussian Academy of Sciences
  • A. A. Bush
    • Moscow State Institute of Radio Engineering, Electronics, and Automation (Technical University)
Optical Properties

DOI: 10.1134/S1063783410040104

Cite this article as:
Komandin, G.A., Torgashev, V.I., Volkov, A.A. et al. Phys. Solid State (2010) 52: 734. doi:10.1134/S1063783410040104
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Abstract

Reflection and transmission infrared spectra of BiFeO3 ceramic samples have been measured using submillimeter spectroscopy (on a backward-wave tube spectrometer) and Fourier-transform infrared spectroscopy in the frequency range from 5 to 1000 cm−1 at temperatures in the range from 10 to 500 K. New resonant modes (probably, magnetic in nature) with the eigenfrequencies decreasing with an increase in the temperature have been recorded in the range 10–30 cm−1 by IR spectroscopy for the first time. An additional absorption with a fairly large dielectric contribution has been revealed in the range 30–60 cm−1. It has been demonstrated that the corresponding oscillators couple with both the lowest frequency phonon mode and the magnetic subsystem.

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© Pleiades Publishing, Ltd. 2010