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Title: Electron microscopy of iron chalcogenide FeTe(Se) films

The structure of Fe{sub 1+δ}Te{sub 1−x}Se{sub x} films (x = 0; 0.05) grown on single-crystal MgO and LaAlO{sub 3} substrates has been investigated by transmission and scanning transmission electron microscopy. The study of Fe{sub 1.11}Te/MgO structures has revealed two crystallographic orientation relationships between the film and substrate. It is shown that the lattice mismatch between the film and substrate is compensated for by the formation of misfit dislocations. The Burgers vector projection is determined. The stresses in the film can partially be compensated for due to the formation of an intermediate disordered layer. It is shown that a FeTe{sub 0.5}Se{sub 0.5} film grown on a LaAlO{sub 3} substrate is single-crystal and that the FeTe{sub 0.5}Se{sub 0.5}/LaAlO{sub 3} interface in a selected region is coherent. The orientation relationships between the film and substrate are also determined for this case.
Authors:
;  [1] ;  [2] ; ;  [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)
Publication Date:
OSTI Identifier:
22472326
Resource Type:
Journal Article
Resource Relation:
Journal Name: Crystallography Reports; Journal Volume: 60; Journal Issue: 3; 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; ALUMINATES; BURGERS VECTOR; CRYSTAL STRUCTURE; DISLOCATIONS; FILMS; INTERFACES; IRON TELLURIDES; LANTHANUM COMPOUNDS; LAYERS; MAGNESIUM OXIDES; MONOCRYSTALS; STRESSES; SUBSTRATES; TRANSMISSION ELECTRON MICROSCOPY