Issue 4, 2014
From the journal:

Physical Chemistry Chemical Physics

Influence of the Ba2+/Sr2+ content and oxygen vacancies on the stability of cubic BaxSr1−xCo0.75Fe0.25O3−δ

Marck Lumeij,a   Michael Gilleßen,a   Henny Bouwmeester,b   Torsten Markus,c   Juri Barthel,de   Stefan Roitsch,de   Joachim Mayerde  and  Richard Dronskowski*a  

* Corresponding authors

a Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany
E-mail: drons@HAL9000.ac.rwth-aachen.de
Fax: +49 241 80 92642
Tel: +49 241 80 93642

b Inorganic Membranes, MESA+ Institute of Nanotechnology, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands
E-mail: h.j.m.bouwmeester@tnw.utwente.nl
Fax: +31 53 489 4683
Tel: +31 53 489 2202

c Institute for Energy- and Climate Research (IEK-2), Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
E-mail: t.markus@fz-juelich.de
Fax: +49 2461 61 3699
Tel: +49 2461 61 4470

d Ernst Ruska-Centre for Microscopy and Spectroscopy with electrons, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
Fax: ju.barthel@fz-juelich.de
Tel: +49 2461 61 2418

e Central Facility for Electron Microscopy, RWTH Aachen University, Ahornstr. 55, D-52074 Aachen, Germany
E-mail: mayer@gfe.rwth-aachen.de
Fax: +49 241 80 22313
Tel: +49 241 80 24345

Abstract

We present a theoretical and experimental study on the influence of the Ba/Sr and Co/Fe ratios as well as the oxygen-non-stoichiometry on the stability of Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF). Thin-layer depositions are analysed by looking at TEM images and EDX spectra. Bond-analytical calculations are performed to explain the stability difference between hexagonal and cubic BSCF. Finally, annealing experiments analysed using XRD give an insight into the differences of phase-fraction growth with respect to the Ba/Sr ratio.

Graphical abstract: Influence of the Ba2+/Sr2+ content and oxygen vacancies on the stability of cubic BaxSr1−xCo0.75Fe0.25O3−δ

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Article information

DOI
https://doi.org/10.1039/C3CP53958J
Article type
Communication
Submitted
18 Sep 2013
Accepted
18 Nov 2013
First published
20 Nov 2013

Phys. Chem. Chem. Phys., 2014,16, 1333-1338

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Influence of the Ba2+/Sr2+ content and oxygen vacancies on the stability of cubic BaxSr1−xCo0.75Fe0.25O3−δ

M. Lumeij, M. Gilleßen, H. Bouwmeester, T. Markus, J. Barthel, S. Roitsch, J. Mayer and R. Dronskowski, Phys. Chem. Chem. Phys., 2014, 16, 1333 DOI: 10.1039/C3CP53958J

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