Journal of Siberian Federal University. Mathematics & Physics / Magnetic Behavior and Nexafs-spectroscopy of Bi₂BaNb₂₋₂ₓСo₂ₓO₉₋δ

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Issue
Journal of Siberian Federal University. Mathematics & Physics. 2019 12 (6)
Authors
Rychkova, Lubov V.; Nekipelov, Sergey V.; Makeev, Boris A.; Belyy, Vladimir A.; Beznosikov, Dmitriy S.; Zhuk, Nadezhda A.
Contact information
Rychkova, Lubov V.: Pitirim Sorokin Syktyvkar State University Oktyabrskiy prospect, 55, Syktyvkar, 167001 Russia; ; Nekipelov, Sergey V.: Pitirim Sorokin Syktyvkar State University Oktyabrskiy prospect, 55, Syktyvkar, 167001 Russia; ; Makeev, Boris A.: Institute of Geology of the Komi Scientific Center UB RAS, Pervomayskaya, 54, Syktyvkar, 167982 Russia; ; Belyy, Vladimir A.: Institute of Chemistry of the Komi Scientific Center UB RAS Pervomayskaya, 48, Syktyvkar, 167982 Russia; ; Beznosikov, Dmitriy S.: Pitirim Sorokin Syktyvkar State University Oktyabrskiy prospect, 55, Syktyvkar, 167001 Russia; ; Zhuk, Nadezhda A.: Pitirim Sorokin Syktyvkar State University Oktyabrskiy prospect, 55, Syktyvkar, 167001 Russia;
Keywords
cobalt; clusters; exchange interactions; NEXAFS-spectroscopy
Abstract

The samples of solid solutions of Bi₂BaNb₂₋₂ₓСo₂ₓO₉₋δ composition at x 0:04 were synthesized by the solid-phase method. The electron state and the nature of the exchange interactions of cobalt atoms in the samples were studied by the measurements of magnetic susceptibility and NEXAFS-spectroscopy. The NEXAFS spectra of the solid solutions and the cobalt oxides CoO, Co3O4 were recorded. According to the data of X-ray spectroscopy and magnetic susceptibility, the charge states of cobalt atoms in the solid solutions were identified as Co(II) and Co(III) in the forms of monomers and exchange-bound aggregates with the antiferromagnetic type of exchange.

Pages
687–693
DOI
10.17516/1997-1397-2019-12-6-687-693
Paper at repository of SibFU
http://elib.sfu-kras.ru/handle/2311/127024