Abstract
The crystal structure and magnetic properties of Bi1 − x A x FeO3 − x/2 (A = Ca, Sr, Pb, Ba), Bi1 − x A x (Fe1 − x Ti x )O3, and Bi1 − x A x (Fe1 − x/2Nb x/2)O3 solid solutions have been studied. It is shown that the homogeneous polar weak ferromagnetic state occurs in the vicinity of a morphotropic phase boundary in the systems where dopant ions lead to the reduction of the unit cell volume in the polar phase. In the case of A = Ca, the non-polar phase also exhibits weak ferromagnetism and the spontaneous magnetizations in the polar and nonpolar phases differ only slightly.
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Original Russian Text © I.O. Troyanchuk, M.V. Bushinsky, N.V. Tereshko, M.I. Kovetskaya, 2011, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2011, Vol. 93, No. 9, pp. 570–574.
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Troyanchuk, I.O., Bushinsky, M.V., Tereshko, N.V. et al. Conditions favoring the polar weak ferromagnetic state in BiFeO3-type multiferroics. Jetp Lett. 93, 512–516 (2011). https://doi.org/10.1134/S0021364011090141
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DOI: https://doi.org/10.1134/S0021364011090141