Abstract
Complex studies of magnetic, electrical, and optical properties of Vx Fe1−x BO3 solid solutions are carried out in the entire range of concentrations between the extreme compounds VBO3 and FeBO3. A concentration semiconductor-insulator transition accompanied by a change in the magnetic structure is observed. It is found that the physical properties of the solid solution under investigation differ from those predicted in the model of a virtual crystal in the form of an aggregate of V and Fe centers taken with the weight of x and 1−x, respectively. The systems of electron energy levels of the VB6O6 and FeB6O6 clusters are calculated from first principles using the Hartree-Fock method. The calculated electron structure forms the basis for simulating the optical absorption spectra, which are in good agreement with experimental results. A qualitative explanation is given for the entire body of data on electrical conductivity and magnetization.
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Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 121, No. 2, 2002, pp. 354–362.
Original Russian Text Copyright © 2002 by Ivanova, Rudenko, Balaev, Kazak, Markov, Ovchinnikov, Edel’man, Fedorov, Avramov.
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Ivanova, N.B., Rudenko, V.V., Balaev, A.D. et al. Magnetic, optical, and electrical properties of solid solutions VxFe1−x BO3 . J. Exp. Theor. Phys. 94, 299–306 (2002). https://doi.org/10.1134/1.1458479
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DOI: https://doi.org/10.1134/1.1458479