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Title: The effect of oxygen vacancies on the electronic phase transition in La{sub 1/3}Sr{sub 2/3}FeO{sub 3} films

Synchrotron x-ray diffraction and electrical resistivity were used to probe the electronic phase transition in two strained La{sub 1/3}Sr{sub 2/3}FeO{sub 3} films on (001) SrTiO{sub 3} substrates, one nominally stoichiometric and one with a higher concentration of oxygen vacancies. We present evidence that oxygen vacancies inhibit the size of charge ordered domains and reduce the abruptness of the phase transition. Additionally, the correlation lengths measured from (4/3 4/3 4/3) peaks, arising from charge disproportionation, increase rapidly across the transition, suggesting that the resistivity increase at the transition temperature is caused by the nucleation and growth of charge ordered domains.
Authors:
; ;  [1] ; ;  [2]
  1. Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104 (United States)
  2. X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
Publication Date:
OSTI Identifier:
22253983
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 21; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ELECTRIC CONDUCTIVITY; OXYGEN; PHASE TRANSFORMATIONS; STRONTIUM TITANATES; TRANSITION TEMPERATURE; VACANCIES; X-RAY DIFFRACTION