Journal
APPLIED PHYSICS LETTERS
Volume 106, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4906920
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Funding
- Norwegian Research Council [10239707]
- Norwegian PhD Network on Nanotechnology for Microsystems
- DFT [NN9301K]
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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. (C) 2015 AIP Publishing LLC.
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