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Title: Lattice mismatch accommodation via oxygen vacancy ordering in epitaxial La0.5Sr0.5CoO3-δ thin films
Authors: Gazquez, J
Bose, S
Sharma, M
Torija, M.A
Pennycook, S.J 
Leighton, C
Varela, M
Issue Date: 2013
Citation: Gazquez, J, Bose, S, Sharma, M, Torija, M.A, Pennycook, S.J, Leighton, C, Varela, M (2013). Lattice mismatch accommodation via oxygen vacancy ordering in epitaxial La0.5Sr0.5CoO3-δ thin films. APL Materials 1 (1) : 12105. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: The properties of complex oxide films depend sensitively on epitaxial strain. This strain affects bond lengths and angles, and defect types and densities, thus impacting physical properties. In this work we perform detailed characterization of depth-dependent strain in epitaxial La0.5Sr 0.5CoO3-δ (LSCO) films on SrTiO3(001), SrTiO3(110), and LaAlO3(001) substrates, combining high resolution x-ray diffraction and scanning transmission electron microscopy, in addition to geometric phase analysis. We elucidate a fundamental link between strain state and O vacancy ordering in LSCO films, where lattice mismatch and crystallographic orientation can be used to manipulate the modulation vector of the long-range vacancy order, thus providing a new approach to tailor the properties of such films. © 2013 Author(s).
Source Title: APL Materials
ISSN: 2166532X
DOI: 10.1063/1.4809547
Rights: Attribution 4.0 International
Appears in Collections:Staff Publications

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