Abstract
The crystal structure and the magnetic properties of multiferroics Bi1–x Ca x Fe1–x Mn x O3 (x ≤ 0.22) have been studied. It has been found that the stoichiometric compositions undergo a crystal-structure transformation from the rhombohedral (space group R3c) polar phase (x ≤ 0.18) to the orthorhombic (space group Pnma) nonpolar phase (x ≥ 0.20) via a two-phase structural state. The polar phase is antiferromagnetic at x < 0.10 and exhibits a metamagnetic behavior. The polar (x ≥ 0.10) and nonpolar phases are weak ferromagnets at room temperature with a spontaneous magnetization close to 0.07 emu/g (x = 0.18 and 0.22). A decrease in temperature leads to the transition to a state close to an antiferromagnetic one.
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Original Russian Text © I.O. Troyanchuk, M.V. Bushinsky, D.V. Karpinsky, A.N. Chobot, N.V. Tereshko, A. Franz, 2016, published in Fizika Tverdogo Tela, 2016, Vol. 58, No. 9, pp. 1719–1723.
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Troyanchuk, I.O., Bushinsky, M.V., Karpinsky, D.V. et al. Phase transformations in multiferroics Bi1–x Ca x Fe1–x Mn x O3 . Phys. Solid State 58, 1777–1781 (2016). https://doi.org/10.1134/S1063783416090316
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DOI: https://doi.org/10.1134/S1063783416090316