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Title

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

Authors
Rey, Julien M.
Published in Physical Review. B, Condensed Matter. 2005, vol. 72, no. 18, p. 184107
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 compoundsFluorine compoundsX-ray crystallographyRaman spectraParamagnetic resonanceSpace groupsSamariumEuropiumLuminescence
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Research groups Groupe Hagemann
Groupe Bill
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REY, Julien M. et al. Ordering of the heavy anions in mixed BaFBr0.5I0.5 crystals: Experimental results. In: Physical Review. B, Condensed Matter, 2005, vol. 72, n° 18, p. 184107. https://archive-ouverte.unige.ch/unige:3618

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Deposited on : 2009-10-02

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