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Ordering of the heavy anions in mixed BaFBr0.5I0.5 crystals: Experimental results

Publication date2005
Abstract

Mixed matlokite hosts of composition BaFBrxI1–x(0x1) (pure and doped with Sm2+, Eu2+) were studied with x-ray crystallography, luminescence, Raman, and electron paramagnetic resonance (EPR) spectroscopy. Results are presented for BaFBr0.5I0.5 which demonstrate that a ferrielectric domain structure is formed due to the fact that the heavy halogen ions form separate sublattices with randomly distributed domain walls. The space group of a domain is P4 mm (No. 99). The EPR data from Eu2+ allowed to determine the volume fraction of domains.

Keywords
  • Barium compounds
  • Fluorine compounds
  • X-ray crystallography
  • Raman spectra
  • Paramagnetic resonance
  • Space groups
  • Samarium
  • Europium
  • Luminescence
Citation (ISO format)
REY, Julien M. et al. Ordering of the heavy anions in mixed BaFBr0.5I0.5 crystals: Experimental results. In: Physical review. B, Condensed matter and materials physics, 2005, vol. 72, n° 18, p. 184107. doi: 10.1103/PhysRevB.72.184107
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Identifiers
ISSN of the journal1098-0121
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