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Title: X-ray diffraction study of Ba{sub 3}TaFe{sub 3}Si{sub 2}O{sub 14} single crystal—a promising langasite-type multiferroic

Ba{sub 3}TaFe{sub 3}Si{sub 2}O{sub 14} single crystals (sp. gr. P321, Z = 1), promising langasite-type multiferroics, have been grown by floating zone melting. An accurate X-ray diffraction study of Ba{sub 3}TaFe{sub 3}Si{sub 2}O{sub 14} single crystal has been performed using two datasets, obtained independently for two different orientations of the same sample on a diffractometer equipped with a CCD area detector at 295 K. Structure refinement is performed based on an averaged dataset: a = 8.5355(1) Å, c = 5.2332(1) Å, sp. gr. P321, Z = 1; the R factors of model structure refinement were found to be R/wR = 1.02/1.23% for 4552 independent reflections. Disordering asymmetry is revealed for the magnetic Fe ion in the 3f site and the Ba cation in the 3e site.
Authors:
 [1] ;  [2] ;  [1]
  1. Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)
  2. Moscow Power Engineering Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22471927
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 61; Journal Issue: 1; Other Information: Copyright (c) 2016 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BARIUM COMPOUNDS; CHARGE-COUPLED DEVICES; IRON IONS; IRON SILICATES; LATTICE PARAMETERS; MONOCRYSTALS; ORIENTATION; R FACTORS; REFLECTION; TANTALUM COMPOUNDS; TRIGONAL LATTICES; X-RAY DIFFRACTION; ZONE MELTING