Structural and Multiferroic Properties of Ba~(2+) Doped BiFeO_3 Nanoparticles Synthesized Via Sol-Gel Method

摘要

Ba~(2+) doped Bismuth ferrite nanoparticles having general formula Bii-_xBa_xFeO_3 (where, x= 0.00 and 0.20) were successfully synthesized by sol gel method, using nitrates as a starting material. Ethylene glycol was used as a solvent. The synthesized powder was sintered at 650°C for 4 hours to obtain pure phase BFO. Leaching with dilute nitric acid (HNO_3) and distilled water (H_2O) is done to remove the impurities. The structural, morphological, magnetic and ferroelectric properties were systematically investigated using standard characterization techniques like X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM) and room temperature magnetic behavior of the samples was studied using pulse field hysteresis loop tracer technique showing increase in saturation magnetizaion. P-E loop confirms the ferroelectric behavior of prepared nanoparticles. The coexistence of ferromagnetic and ferroelectric hysteresis loops in BFO and Bi_(0.8)Ba_(0.2)FeO_3 nanoparticles samples at room temperature; it indicates that the samples are potential candidates for information storage and spintronics devices. The increase in magnetic properties may be important for practical application at room temperature.