Preparation and properties of multiferroic bismuth iron oxides
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The compositional dependence of bismuth iron oxides and effect of La-substitutions in the structure of BiFeO3 compounds were investigated, which compounds were synthesized by conventional ceramic processing. It is shown that some of bismuth iron oxides including BiFeO3 show the narrow single phase region. The effect of La-doping in BiFeO3 was presented as disappearance of many impurity phases of Bi-Fe-O compounds. The lower electrical resistivity was obtained as those compositions of Fe deficient region and La-doped BiFeO3. The saturation magnetization of La-doped BiFeO3 was increased with La content. The dielectric dispersion was also observed for those Bi-Fe-O compounds with Fe deficient and La-doped BiFeO3 at low frequencies under 1 kHz.
Abstract
BiFeO3, Canted orthoferrite, Multiferroic oxide, Dielectric dispersion
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