Abstract
Single-phase Bi 1− x Eu x FeO 3 (0 ≤ x ≤ 0.3) multiferroic ceramics were prepared to study the effects of Eu substitution on their crystal structure and ferroelectromagnetic behavior. X-ray diffraction studies revealed a sequence of the composition-driven structural phase transitions R3c → Pn2 1 a (occurs at x = 0.2). Magnetic measurements revealed that Eu substitution can effectively induce the appearance of the spontaneous magnetization, which was significantly enhanced upon the composition-driven transition from a rhombohedral to an orthorhombic phase. The leakage current was found to be reduced on increased Eu concentration. The electric hysteresis loops were obtained in the Bi 1− x Eu x FeO 3 ceramics, but the loops were not really saturated. The magnetoelectric coupling in Eu-doped BiFeO 3 was estimated by the changes in the dielectric constant with an external magnetic filed.
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