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Title
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Layered oxygen vacancy ordering in Nb-doped perovskite
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Author
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Abstract
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| The crystal structure of SrCo0.7Fe0.2Nb0.1O2.72 was determined using a combination of precession electron diffraction (PED), high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and spatially resolved electron energy loss spectroscopy (STEM-EELS). The structure has a tetragonal P4/mmm symmetry with cell parameters a = b = a(p), c = 2a(p) (a(p) being the cell parameter of the perovskite parent structure). Octahedral BO2 layers alternate with the anion-deficient BO1.4 layers, the different B cations are randomly distributed over both layers. The specific feature of the SrCo0.7Fe0.2NB0.1O2.72 microstructure is a presence of extensive nanoscale twinning resulting in domains with alignment of the tetragonal c-axis along all three cubic direction of the perovskite subcell. |
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Language
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English
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Source (journal)
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Zeitschrift für Kristallographie. - München
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Publication
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München
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2013
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ISSN
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0044-2968
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DOI
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10.1524/ZKRI.2013.1556
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Volume/pages
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228
:1
(2013)
, p. 28-34
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ISI
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000315475900004
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Full text (Publisher's DOI)
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Full text (open access)
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