Abstract
A novel sol-gel auto-combustion technique is utilized to prepare nano-sized, perovskite-structured LaFeO3 powders. The nanoparticles were synthesized for three distinct precursor concentrations (0.5, 1 and 1.5 M) maintaining pH, annealing temperature and time. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, high-resolution scanning electron microscopy (HRSEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray absorption spectroscopy (EDAX), diffuse reflectance spectroscopy (DRS), photoluminescence (PL) study and vibrating sample magnetometer (VSM). XRD revealed that all the prepared samples have shown an orthorhombic phase with space group Pnma. DRS suggested a marginal increase in bandgap and the average band gap was found to be 2.2 eV VSM analysis has shown that all the prepared samples exhibit weak ferromagnetic behaviour due to uncompensated canted spins. All the studies performed revealed a significant modification of structural, optical and magnetic properties with the variation of precursor concentration.
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