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.
BiFeO_3 thin films were grown by chemical solution deposition using precursors with different elemental ratios, Bi/Fe = 1.1/1.0, 1.0/1.0 and 1.0/1.1. All the samples consisted of two easily distinguishable components of crystalline and amorphous phases. We have found that the electric properties of BiFeO_3 thin films are closely connected to the crystallinity of the films.
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.