Effect of Calcination Temperature on La0.7Sr0.3MnO3 Nanoparticles Synthesized with Modified Sol-gel Route

We report a modified route to synthesize La0.7Sr0.3MnO3 nanoparticle with oxalic acid as chelating agent and oleic acid as surfactant at different calcination temperatures. The synthesized nanoparticles were characterized using XRD, SEM, FTIR and VSM. XRD confirms the formation of phase pure perovskite structure with particle size of about 20 nm. SEM and HRSEM reveal a well refined structure with respect to calcination temperature. FTIR confirms the formation of perovskite with broad peak around 520 cm–1. Magnetic study reveals that these nanoparticle with irregular structure exhibit ferromagnetic nature with different value of magnetization except for 500 °C, which shows paramagnetic nature.