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Title: Electronic phase diagram of epitaxial La{sub 1−x}Sr{sub x}FeO{sub 3} films

The electronic phase diagram of epitaxial La{sub 1−x}Sr{sub x}FeO{sub 3} films is presented. The films were grown on SrTiO{sub 3} using molecular beam epitaxy with post-growth annealing to minimize oxygen vacancies. Insulating behavior is observed from x = 0–0.9, with metallic conduction only present for x = 1.0. While the La-rich compounds exhibit polaron conduction over all temperatures measured, the Sr-rich films exhibit an electronic phase transition within the compositional window of x = 0.49–0.9 as revealed by temperature-dependent resistivity measurements. The transition temperatures are found to decrease with increasing Sr content. The constructed phase diagram is discussed in the context of other 3d e{sub g} perovskite systems including manganites and cobaltites.
Authors:
; ; ; ; ;  [1]
  1. Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104 (United States)
Publication Date:
OSTI Identifier:
22317999
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; IRON OXIDES; LANTHANUM; MOLECULAR BEAM EPITAXY; OXYGEN; PEROVSKITE; PHASE DIAGRAMS; PHASE TRANSFORMATIONS; STRONTIUM; STRONTIUM TITANATES; TRANSITION TEMPERATURE; VACANCIES