Synthesis and Characterization of Mn-Doped BiFeO₃Nanoparticles

Abstract

BiFeO 3 is a multiferroic material showing antiferromagnetic ordering and ferroelectric behavior simultaneously. Here, Mn-doped BiFeO 3 nanoparticles were synthesized up to 10% of Mn composition by a sol-gel process. The samples showed high crystallinity with no secondary phase up to 2% of Mn doping. A phonon peak at 1250 cm -1 in undoped BiFeO 3 showed anomalous intensity enhancement in the magnetically ordered phase below T N = 643 K due to a spin-phonon coupling. This behavior was less pronounced in the Mn-doped samples, suggesting a suppression of magnetic ordering between Fe 3+ spins by Mn doping.