Nanoscale Ordering in Oxygen Deficient Quintuple Perovskite Sm2-epsilon Ba3+epsilon Fe5O15-delta: Implication for Magnetism and Oxygen Stoichiometry / Volkova Nadezhda E.,Lebedev Oleg I.,Gavrilova Ludmila Ya.,Turner Stuart,Gauquelin Nicolas,Seikh Md Motin,Caignaert Vincent,Cherepanov Vladimir A.,Raveau Bernard,Van Tendeloo Gustaaf // CHEMISTRY OF MATERIALS. - 2014. - V. 26, l. 21. - P. 6303-6310.

ISSN/EISSN:

0897-4756 / 1520-5002

Type:

Article

Abstract:

The investigation of the system SmBaFe-O in air has allowed an oxygen deficient perovskite Sm2-epsilon Ba3+epsilon Fe5O15-delta (delta = 0.75, epsilon = 0.125) to be synthesized. In contrast to the XRPD pattern which gives a cubic symmetry (a(p) = 3.934 angstrom), the combined HREM/EELS study shows that this phase is nanoscale ordered with a quintuple tetragonal cell, a(p) X a(p) X 5(ap). The nanodomains exhibit a unique stacking sequence of the A-site cationic layers along the crystallographic c-axis, namely SmBaBa/SmBa/SmBaSm, and are chemically twinned in the three crystallographic directions. The nanoscale ordering of this perovskite explains its peculiar magnetic properties on the basis of antiferromagnetic interactions with spin blockade at the boundary between the nanodomains. The variation of electrical conductivity and oxygen content of this oxide versus temperature suggest potential SOFC applications. They may be related to the particular distribution of oxygen vacancies in the lattice and to the 3d(5)(L) under bar configuration of iron.

Author keywords:

OXIDE FUEL-CELLS; PHASE-EQUILIBRIA; CRYSTAL-STRUCTURE; SM; ND; LN; LA; CATHODES; SYSTEMS; GD

DOI:

10.1021/cm503276p

Web of Science ID:

ISI:000344905600029

Соавторы в МНС:

Другие поля

Поле	Значение
Month	NOV 11
Publisher	AMER CHEMICAL SOC
Address	1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Language	English
EISSN	1520-5002
Keywords-Plus	OXIDE FUEL-CELLS; PHASE-EQUILIBRIA; CRYSTAL-STRUCTURE; SM; ND; LN; LA; CATHODES; SYSTEMS; GD
Research-Areas	Chemistry; Materials Science
Web-of-Science-Categories	Chemistry, Physical; Materials Science, Multidisciplinary
Author-Email	v.a.cherepanov@urfu.ru bernard.raveau@ensicaen.fr
ResearcherID-Numbers	Cherepanov, Vladimir/E-6451-2014
ORCID-Numbers	Cherepanov, Vladimir/0000-0003-3653-6459
Funding-Acknowledgement	Ministry of Education and Science of Russian Federation {[}4.1039.2014/K]; UrFU under the Framework Program of development of UrFU through the ``Young scientists UrFU{''} competition; EC; CNRS; French Ministry of Education and Research; European Research Council under the Seventh Framework Program (FP7), ERC {[}246791 - COUNTATOMS]; fund for scientific research Flanders; European Research Council {[}278510 - VORTEX]; {[}G004413N]
Funding-Text	The UrFU authors were financially supported by the Ministry of Education and Science of Russian Federation (project N 4.1039.2014/K) and by UrFU under the Framework Program of development of UrFU through the ``Young scientists UrFU{''} competition. The CRISMAT authors gratefully acknowledge the EC, the CNRS, and the French Ministry of Education and Research for financial support through their Research, Strategic and Scholarship programs. This work was supported by funding from the European Research Council under the Seventh Framework Program (FP7), ERC grant No. 246791 - COUNTATOMS. S.T. gratefully acknowledges the fund for scientific research Flanders for a postdoctoral fellowship and for financial support under contract number G004413N. N.G. acknowledges funding from the European Research Council under the 7th Framework Program (FP7), ERC starting grant number 278510 - VORTEX.
Number-of-Cited-References	34
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	41
Journal-ISO	Chem. Mat.
Doc-Delivery-Number	AT4JL