Published January 26, 2015 | Version v1
Journal article Metadata-only

Structural phases driven by oxygen vacancies at the La0.7Sr0.3MnO3/SrTiO3 hetero-interface

Creators

  • 1. Department of Physics, NTNU, 7491 Trondheim (Norway)
  • 2. Materials and Chemistry, SINTEF, 7465 Trondheim (Norway)
  • 3. Department of Electronics and Telecommunications, NTNU, 7491 Trondheim (Norway)
  • 4. Department of Materials Science and Engineering, NTNU, 7491 Trondheim (Norway)

Description

An oxygen vacancy driven structural response at the epitaxial interface between La0.7Sr0.3MnO3 films and SrTiO3 substrates is reported. A combined scanning transmission electron microscopy and electron energy loss spectroscopy study reveal the presence of an elongated out-of-plane lattice parameter, coupled to oxygen vacancies and reduced manganese oxidation state at the La0.7Sr0.3MnO3 side of the interface. Density functional theory calculations support that the measured interface structure is a disordered oxygen deficient brownmillerite structure. The effect of oxygen vacancy mobility is assessed, revealing an ordering of the vacancies with time

Additional details

Identifiers

DOI
10.1063/1.4906920;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
106
Journal Issue
4
Journal Page Range
p. 041604-041604.4
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
46121072
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
DENSITY FUNCTIONAL METHOD; ELECTRONS; ENERGY-LOSS SPECTROSCOPY; EPITAXY; FILMS; INTERFACES; LANTHANUM; LATTICE PARAMETERS; MANGANESE; MANGANESE OXIDES; OXYGEN; STRONTIUM; STRONTIUM TITANATES; SUBSTRATES; TRANSMISSION ELECTRON MICROSCOPY; VACANCIES
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ALKALINE EARTH METALS; CALCULATION METHODS; CHALCOGENIDES; CRYSTAL DEFECTS; CRYSTAL GROWTH METHODS; CRYSTAL STRUCTURE; ELECTRON MICROSCOPY; ELECTRON SPECTROSCOPY; ELEMENTARY PARTICLES; ELEMENTS; FERMIONS; LEPTONS; MANGANESE COMPOUNDS; METALS; MICROSCOPY; NONMETALS; OXIDES; OXYGEN COMPOUNDS; POINT DEFECTS; RARE EARTHS; SPECTROSCOPY; STRONTIUM COMPOUNDS; TITANATES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; VARIATIONAL METHODS

Optional Information

Notes
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