Geodesic
Magnetic behavior and nexafs-spectroscopy of Bi$_2$BaNb$_{2-2x}$Сo$_{2x}$O$_{9-\delta}$
Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 12 (2019) no. 6, pp. 687-693 Cet article a éte moissonné depuis la source Math-Net.Ru

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The samples of solid solutions of Bi$_2$BaNb$_{2-2x}$Сo$_{2x}$O$_{9-\delta}$ composition at $x \leqslant 0.04$ 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, Co$_3$O$_4$ 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.
Keywords: cobalt, clusters, exchange interactions, NEXAFS-spectroscopy. 
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     author = {Lubov V. Rychkova and Sergey V. Nekipelov and Boris A. Makeev and Vladimir A. Belyy and Dmitriy S. Beznosikov and Nadezhda A. Zhuk},
     title = {Magnetic behavior and nexafs-spectroscopy of {Bi}$_2${BaNb}$_{2-2x}${{\CYRS}o}$_{2x}${O}$_{9-\delta}$},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {687--693},
     year = {2019},
     volume = {12},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2019_12_6_a3/}
}
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Lubov V. Rychkova; Sergey V. Nekipelov; Boris A. Makeev; Vladimir A. Belyy; Dmitriy S. Beznosikov; Nadezhda A. Zhuk. Magnetic behavior and nexafs-spectroscopy of Bi$_2$BaNb$_{2-2x}$Сo$_{2x}$O$_{9-\delta}$. Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 12 (2019) no. 6, pp. 687-693. http://geodesic.mathdoc.fr/item/JSFU_2019_12_6_a3/

[1] G.A. Smolensky, Physics of ferroelectric phenomena, Nauka, L., 1985 (in Russian)

[2] G.A. Geguzina, A.T. Shuvaev, E.T. Shuvaeva, V.G. Vlasenko, “Synthesis and Structure of New Phases of the A$_{m - 1}$Bi$_2$B$_m$O$_{3m + 3}$ $(m = 2)$ Type”, Cristallograph. Rep., 50 (2005), 59–64

[3] V.A. Isupov, “Crystal chemical aspects of the bismuth-containing layered compounds of the A$_{m - 1}$Bi$_2$B$_m$O$_{3m + 3}$ type”, Ferroelectrics, 189 (1996), 211–227 | DOI

[4] R. Macquart, B.J. Kennedy, T. Kamiyama, F. Izumi, “Structural phase transitions in the ferroelectric oxides Ba$_{1-x}$Pb$_x$Bi$_2$Nb$_2$O$_9$ (x = 0.375, 0.625)”, J. Phys.-Condes. Matter., 16 (2004), 5443–5452 | DOI

[5] Ismunandar, B.J. Kennedy, Gunawan, Marsongkohadi, “Structure of ABi$_2$Nb$_2$O$_9$ (A = Sr, Ba): Refinement of Powder Neutron Diffraction Data”, J. Solid State Chem., 126 (1996), 135–141 | DOI

[6] L.G. Akselrud, Yu.N. Grin, P. Yu. Zavalij, et al., “CSD-universal program package for single crystal or powder structure data treatment”, Thes. Rep. XII Eur. Crystallographic. Meet., v. 3, 1985, 155

[7] R.D. Shannon, “Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides”, Acta Crystallogr. A, 32 (1976), 751–767 | DOI

[8] N.A. Zhuk, N.V. Chezhina, V.A. Belyy et al., “Magnetic susceptibility of solid solutions Bi$_2$SrNb$_{2--2x}$Fe$_{2x}$O$_{9-\delta}$”, J. Magn. Magn. Mater., 451 (2018), 96–101 | DOI

[9] N.A. Zhuk, N.V. Chezhina, Belyy et al., “Influence of barium and strontium atoms on magnetic properties of iron-containing solid solutions Bi$_2$MNb$_2$O$_9$ (M - Ba, Sr)”, J. Magn. Magn. Mater., 469 (2019), 574–579 | DOI

[10] V.T. Kalinnikov, Yu.V. Rakitin, Introduction to Magnetochemistry. Method of Static Magnetic Susceptibility in Chemistry, Nauka, M., 1980 (in Russian)

[11] J. Stohr, NEXAFS Spectroscopy, Springer, Berlin, 1992

[12] T.J. Regan, Ohldag H., Stamm C. et al., “Chemical effects at metal/oxide interfaces studied by x-ray-absorption spectroscopy”, Phys. Rev. B, 64 (2001), 214422 | DOI

[13] N.V. Chezhina, N.A. Zhuk, “Structure, magnetic, and electrical properties of bismuth niobates doped with d-elements: XII. Magnetic behavior of Bi$_3$Nb$_{1-x}$Mn$_x$O$_{7-\delta}$ solid solutions”, Russ. J. Gen. Chem., 85 (2015), 2520–2524 | DOI

[14] Z N.A. huk, V.A. Belyy, V.P. Lutoev et al., “Mn doped BiNbO$_4$ ceramics: Thermal stability, phase transitions, magnetic properties, NEXAFS and ESR spectroscopy”, Alloy compd., 778 (2019), 418–426 | DOI