Room temperature magnetic biasing in Bi0.85La0.15FeO3 and BaTiO3 composite

Abstract

In this study, the crystal structure and magnetic properties of two sets of multiferroic nanocomposites of Bi0.85La0.15FeO3 (BLFO) and BaTiO3 (BTO) were reported. The samples were prepared by adopting the conventional solid-state reaction and ball mill technique. The X-ray diffraction pattern and Raman spectra analysis reveal the impurity-free crystal structure, and both the phases (i.e., BLFO and BTO) are present in parallel in the nanocomposites. Scanning electron microscopy was used to study the surface morphology. The saturation magnetizations of the ball-milled nanocomposite are found to be significantly higher compared to that of the solid-state composites. The Vegard law was used to compare the observed saturation magnetization with the oretical values. The pinched hysteresis loop was observed in both sets of composites, which was explained by exchange type magnetic interaction between BLFO and BTO. The squareness ratio (R) tells the presence of intergrain magnetostatic interaction in the composites. The hysteresis loop width (ΔH) versus magnetization (M) plots for all the composites reveals the hysteresis loop anomalies.