A comparative study of the structural, magnetic transport and electrochemical properties of La0.7Sr0.3MnO3 synthesized by different chemical routes

A comparative study of the structural, magnetic, transport and electrochemical properties of the La0.7Sr0.3MnO3 (LSMO) synthesized by sol–gel, solution combustion and solid-state reaction has been discussed in details. Synthesis process controls the structure and morphology of the material which determine the overall characteristics of the material. The sol–gel and solution combustion method provide nanocrystalline material with an average particle size of 23.03 nm 17.9 nm, respectively; while, microcrystalline material with an average particle size of 160 nm is synthesized by solid-state reaction method. The magnetic properties of the material are improved with an increase in particle size from nanoscale to microscale, while resistivity increases with a reduction in the size of the material. The LSMO synthesized by the sol–gel method shows the highest magnetoresistance of 32.3% at 10 K with a 1T magnetic field. The solution combustion method provides LSMO nanoparticles with large surface area and porosity which results in its better electrochemical behavior as compared to the LSMO synthesized by sol–gel and solid-state reaction.