Abstract
Single-phase rhombohedral perovskites (Bi0.9Sr0.1)FeO3 were studied by Mossbauer spectroscopy at temperatures of 293, 87, and 680 K. The Neel temperature TN = 652 ± 2 K of the magnetic transition was measured. Three states of trivalent iron ions in the octahedral states were discovered. Substitution of Sr2+ for 0.1 mol % Bi3+ breaks the spatially spin-modulated structure.
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