Multiferroic properties of La and Mn co-doped BiFeO3 nanofibers by sol-gel and electrospinning technique

The La and Mn co-doped BiFeO3 nanofibers were synthesized in order to obtain one-dimensional multiferroic materials with better performance. The fibers before and after heat treatment had high aspect ratios, and the fibrous morphology could be observed obviously. With the substitution of Mn ions onto Fe sites, the Bi0.9La0.1Fe0.95Mn0.05O3 nanofibers presented a larger saturation magnetization at room temperature, and the double exchange interactions of Fe3+–O–Fe2+ increased. The values of remanent polarization and coercive field were 0.162μC/cm2 and 5.633kV/cm measured at a voltage of 2000V, respectively. The Fe3+ to Fe2+ ratios of the samples increased from 45.24/54.76 to 54.68/45.32 due to the Mn doping.