Specific features of phase equilibriums in Ln–Ba–Fe–O systems
- Authors: Volkova N.E.1, Urusova A.S.1, Gavrilova L.Y.1, Bryuzgina A.V.1, Deryabina K.M.1, Mychinko M.Y.1, Lebedev O.I.2,3, Raveau B.2, Cherepanov V.A.1
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Affiliations:
- Ural Federal University
- Laboratoire CRISMAT
- St. Petersburg National Research University of Information Technologies, Mechanics, and Optics (ITMO)
- Issue: Vol 86, No 8 (2016)
- Pages: 1800-1804
- Section: Article
- URL: https://journals.rcsi.science/1070-3632/article/view/215899
- DOI: https://doi.org/10.1134/S1070363216080041
- ID: 215899
Cite item
Abstract
Formation of five-layered Ln2–εBa3+εFe5O15–δ phases [exhibiting nanoscale ordering with layer-by-layer location of the cations in the Ln–Ba–(Ln,Ba)–(Ln,Ba)–Ba–Ln perovskite-type structure] has occurred in the Ln–Ba–Fe–O (Ln = Y, Pr, Nd, Sm, Eu, and Gd) systems at 1100°С in air. Partial substitution of iron with cobalt (Ln2–εBa3+εFe5–yCoyO15–δ, Ln = Nd, Sm, Eu) has stabilized formation of the ordered structure. The oxygen content in the complex oxides has been determined in air over a wide temperature range by means of high-temperature thermogravimetry and iodometric titration. The change in oxygen content with temperature for the phases with five-layered ordering was significantly smaller than for the disordered phases.
About the authors
N. E. Volkova
Ural Federal University
Email: v.a.cherepanov@urfu.ru
Russian Federation, pr. Lenina 51, Yekaterinburg, 620000
A. S. Urusova
Ural Federal University
Email: v.a.cherepanov@urfu.ru
Russian Federation, pr. Lenina 51, Yekaterinburg, 620000
L. Ya. Gavrilova
Ural Federal University
Email: v.a.cherepanov@urfu.ru
Russian Federation, pr. Lenina 51, Yekaterinburg, 620000
A. V. Bryuzgina
Ural Federal University
Email: v.a.cherepanov@urfu.ru
Russian Federation, pr. Lenina 51, Yekaterinburg, 620000
K. M. Deryabina
Ural Federal University
Email: v.a.cherepanov@urfu.ru
Russian Federation, pr. Lenina 51, Yekaterinburg, 620000
M. Yu. Mychinko
Ural Federal University
Email: v.a.cherepanov@urfu.ru
Russian Federation, pr. Lenina 51, Yekaterinburg, 620000
O. I. Lebedev
Laboratoire CRISMAT; St. Petersburg National Research University of Information Technologies, Mechanics, and Optics (ITMO)
Email: v.a.cherepanov@urfu.ru
France, Caen; St. Petersburg
B. Raveau
Laboratoire CRISMAT
Email: v.a.cherepanov@urfu.ru
France, Caen
V. A. Cherepanov
Ural Federal University
Author for correspondence.
Email: v.a.cherepanov@urfu.ru
Russian Federation, pr. Lenina 51, Yekaterinburg, 620000
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