Structural Features of a Substituted Strontium Ferrite Sr1 – xLaxFeO3 – δ: I. Sr2LaFe3O9 – δ

The structure and the valence states of iron in substituted strontium ferrite Sr 2/3 La 1/3 FeO 3 – δ or Sr 3 LaFe 3 O 9 – δ at various condition synthesis and heat treatment have been studied using X-ray diffraction and the Mössbauer spectroscopy. A series of vacuum annealing (10 –3 Torr, 400–650°C...

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Published inPhysics of the solid state Vol. 63; no. 12; pp. 1775 - 1784
Main Authors Sedykh, V. D., Rybchenko, O. G., Barkovskii, N. V., Ivanov, A. I., Kulakov, V. I.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 2021
Springer Nature B.V
Subjects
Ferrites
Heat treatment
Iron
Mossbauer spectroscopy
Physics
Physics and Astronomy
Solid State Physics
Substitutes
Vacuum annealing
Valence
perovskites
substituted strontium ferrite
X-ray spectra
Mössbauer spectra
oxygen vacancies
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Summary:The structure and the valence states of iron in substituted strontium ferrite Sr 2/3 La 1/3 FeO 3 – δ or Sr 3 LaFe 3 O 9 – δ at various condition synthesis and heat treatment have been studied using X-ray diffraction and the Mössbauer spectroscopy. A series of vacuum annealing (10 –3 Torr, 400–650°C) allows the observation of the evolution of the structure from the rhombohedral (for the Sr 2 LaFe 3 O 9 ) to the orthorhombic (Sr 2 LaFe 3 O 8 ) via intermediate multiphase states and also the redistribution of valence iron states.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783421100322