SOBOLEV, Alexey; PRESNIAKOV, Igor; POKHOLOK, Konstantin; RUSAKOV, Viyacheslav S.; GUBAIDULINA, Tatyana V.; BARANOV, Alexey; DEMAZEAU, Gérard

doi:10.3103/S1062873807090274

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SOBOLEV, Alexey
Chair of Radiochemistry, Department of Chemistry

PRESNIAKOV, Igor
Chair of Radiochemistry, Department of Chemistry

POKHOLOK, Konstantin
Chair of Radiochemistry, Department of Chemistry

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Bulletin of the Russian Academy of Sciences - Physics. 2007, vol. 71, n° 9, p. 1314-1321

Springer Verlag/Russian Academy of Sciences (RAS)

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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.< Réduire

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Perovskites

Inorgannic compounds

Solid solution

Mössbauer spectroscopy

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119Sn and 57Fe Mössbauer study of the local structure of perovskite-type ferrites CaFe2−xNxO5 (N = Sc, Al) and manganite CaMn7O12

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