Magnetocapacitance and structure properties of Bi0.85−xLa0.15PbxFeO3 ceramics

To study the effects of La and Pb co-doping on the magnetocapacitance (MC) and structure properties of BiFeO3, single-phase Bi0.85-xLa0.15PbxFeO3 (BLPF, x=0-0.10) multiferroic ceramics were prepared by a solid-state reaction. In the Rietveld refinement, good agreement between the observed and calculated pattern was observed. The dielectric response of these samples was analyzed in the frequency range of 100 Hz-10 MHz, and it was found that Pb-doping drastically improved the dielectric properties. Moreover, the MC and magnetoelectric effect were enhanced, show a large MC effect (~18.8%) and magnetoelectric voltage coefficient αE (~90.6 mV/cm/Oe) for BLPFx=0.05 ceramic.