Abstract
Solid solutions of Bi1 − x A x (Fe1 − x/2Nb x/2)O3, where A = Ca, Ba, and Pb, are obtained and their crystal structure and magnetic properties are investigated. It is shown that for A = Ca and x ≈ 0.15, the symmetry of the unit cell changes from rhombohedral (space group R3c) to orthorhombic (Pbnm). The transformation leads to the emergence of spontaneous magnetization due to the Dzyaloshinskii-Moriya interaction. Solid solutions with A = Pb remain rhombohedral up to a concentration of x = 0.3. Spontaneous magnetization sharply increases in the compound with x ≈ 1 at low temperatures and is due to the formation of the spin-glass component.
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Original Russian Text © I.O. Troyanchuk, M.V. Bushinsky, A.N. Chobot, O.S. Mantytskaya, N.V. Pushkarev, R. Szymczak, 2008, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2008, Vol. 134, No. 2, pp. 291–297.
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Troyanchuk, I.O., Bushinsky, M.V., Chobot, A.N. et al. Crystal-structure and magnetic phase transformations in solid solutions of BiFeO3-AFe0.5Nb0.5O3 (A = Ca, Sr, Ba, Pb). J. Exp. Theor. Phys. 107, 245–250 (2008). https://doi.org/10.1134/S1063776108080086
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DOI: https://doi.org/10.1134/S1063776108080086