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Title: Single-crystal structure study of iron chalcogenides Fe{sub 1+δ}Te{sub 1−x}S{sub x}

Single crystals of iron chalcogenides Fe{sub 1+δ}Te{sub 1−x}S{sub x} (x = 0, 0.09, and 0.1) were studied by scanning, transmission, and scanning transmission electron microscopy. In addition, a sample with x = 0 was studied by X-ray diffraction. The Te-site disorder observed in Fe{sub 1+δ} samples is, apparently, assigned to the incorporation of superstoichiometric iron Fe2 into the structure. The Fe1 atoms were found to be displaced from their ideal positions, which can only partially be attributed to electro-optical effects. The replacement of Te atoms by S in Fe{sub 1+δ}Te{sub 1−x}S{sub x} crystals gives rise to domains with ordered S atoms in some regions of the single crystal, resulting in the formation of a 2 × 1 or 2 × 2 superstructure.
Authors:
 [1] ;  [2] ;  [1] ; ;  [3] ;  [4] ;  [3] ;  [2] ;  [1]
  1. National Research Centre “Kurchatov Institute” (Russian Federation)
  2. Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)
  3. Moscow State University (Russian Federation)
  4. Russian Academy of Sciences, Institute of Experimental Mineralogy (Russian Federation)
Publication Date:
OSTI Identifier:
22472407
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 60; Journal Issue: 2; Other Information: Copyright (c) 2015 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; ATOMS; CHALCOGENIDES; CONCENTRATION RATIO; ELECTRO-OPTICAL EFFECTS; IRON COMPOUNDS; MONOCRYSTALS; SCANNING ELECTRON MICROSCOPY; TELLURIUM SULFIDES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION