Ordering of the heavy anions in mixed BaFBr{sub 0.5}I{sub 0.5} crystals: Experimental results

Journal Article · Tue Nov 01 00:00:00 EST 2005 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.72.184107· OSTI ID:20719815

Rey, J M; Bill, H; Hagemann, H; Kubel, F ^[1]

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1. Departement de Chimie Physique, Sciences 2, 30 quai Ernest Ansermet, 1211 Geneva 4 (Switzerland)

Mixed matlokite hosts of composition BaFBr{sub x}I{sub 1-x}(0{<=}x{<=}1) (pure and doped with Sm{sup 2+}, Eu{sup 2+}) were studied with x-ray crystallography, luminescence, Raman, and electron paramagnetic resonance (EPR) spectroscopy. Results are presented for BaFBr{sub 0.5}I{sub 0.5} 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 Eu{sup 2+} allowed to determine the volume fraction of domains.

• OSTI ID: 20719815
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 72, Issue 18; Other Information: DOI: 10.1103/PhysRevB.72.184107; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
ANIONS
BARIUM COMPOUNDS
CRYSTALLOGRAPHY
CRYSTALS
DOMAIN STRUCTURE
DOPED MATERIALS
ELECTRON SPIN RESONANCE
EUROPIUM
EUROPIUM IONS
FLUORINE COMPOUNDS
LUMINESCENCE
PARAMAGNETISM
RAMAN SPECTRA
SAMARIUM
SAMARIUM IONS
SPACE GROUPS
X RADIATION