Bulk interface engineering for enhanced magnetization in multiferroic BiFeO_3 compounds

摘要

We investigated composites of two antiferromagnetic perovskite oxides BiFeO_3 and LaMnO_3 to study change in bulk magnetic behavior. Composites with nominal compositions (1-x)BiFeO_3-xLaMnO_3 (x = 0, 5, 10, 20 wt. %) were synthesized by solid state reaction route. The structural analysis performed using X-ray diffraction and Raman spectroscopy indicated presence of phase separated compounds. Significant enhancement in magnetic moment is observed in composite samples, which was attributed to the uncompensated spins at the interface of two distinct antiferromagnetic phases.