Abstract
Single-phase BiFeO3 (BFO) nanoparticles with an average size of ∼64 nm were synthesized using formic acid and ethylene glycol as agents through a modified Pechini type sol–gel method. The present work highlights the synthesis of phase-pure BFO that lies on the right selection of chelating agent and complexing agent. Thermal and Fourier transform infrared (FTIR) studies revealed the temperature at which the metal oxide forms. X-ray diffraction patterns showed a gradual phase evolution as calcined temperature increased from 400 to 600 °C. The values of Rietveld refinement parameters (Rwp=5.42%, Rp=4.2%, Goodness of fit (S)=1.29) confirmed the single-phase BFO corresponding to rhombohedral perovskite structure with the space group R3c. Selected area electron diffraction pattern displayed the polycrystalline nature of the synthesized particles. The M–H loop measured at room temperature for the sample calcined at 500 °C revealed a ferromagnetic-like component with a coercivity of ∼907 Oe, whereas the sample calcined at 600 °C exhibited the typical antiferromagnetism.
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