119Sn and 57Fe Mössbauer study of the local structure of perovskite-type ferrites CaFe2−xNxO5 (N = Sc, Al) and manganite CaMn7O12
BARANOV, Alexey
Chair of Radiochemistry, Department of Chemistry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
< Reduce
Chair of Radiochemistry, Department of Chemistry
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Language
en
Article de revue
This item was published in
Bulletin of the Russian Academy of Sciences - Physics. 2007, vol. 71, n° 9, p. 1314-1321
Springer Verlag/Russian Academy of Sciences (RAS)
English Abstract
Anion-deficient substituted ferrites Ca2Fe2 − x N x O5 (N = Sc3+, Al3+) and mixed manganite CaMn7O12 have been investigated by 119Sn and 57Fe probe Mössbauer spectroscopy. The mechanism of charge compensation for heterovalent ...Read more >
Anion-deficient substituted ferrites Ca2Fe2 − x N x O5 (N = Sc3+, Al3+) and mixed manganite CaMn7O12 have been investigated by 119Sn and 57Fe probe Mössbauer spectroscopy. The mechanism of charge compensation for heterovalent impurity Sn4+ ions in the structure of the ferrite Ca2Fe2O5 has been established. The presence of nonequivalent crystallographic positions of manganese cations, caused by their charge ordering in the structure of the manganite CaMn7O12, is shown. Magnetic ordering of Mn3+ and Mn4+ cations in the octahedral sublattice of CaMn7O12 at T < T M2 ≈ 90 K is established.Read less <
English Keywords
Perovskites
Inorgannic compounds
Solid solution
Mössbauer spectroscopy
Origin
Hal imported