Title
Layered oxygen vacancy ordering in Nb-doped <tex>$SrCo_{1-x}Fe_{x}O_{3-\delta}$</tex> perovskite Layered oxygen vacancy ordering in Nb-doped <tex>$SrCo_{1-x}Fe_{x}O_{3-\delta}$</tex> perovskite
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
München ,
Subject
Physics
Chemistry
Source (journal)
Zeitschrift für Kristallographie. - München
Volume/pages
228(2013) :1 , p. 28-34
ISSN
0044-2968
ISI
000315475900004
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
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.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/780822/4736.pdf
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