Preparation, structural and magnetic studies on BiFe1-xCrxO3 (x=0.0, 0.05 and 0.1) multiferroic nanoparticles

摘要

BiFe1-xCrxO3 (x=0.0, 0.05 and 0.1) nanoparticles are prepared by a combustionmethod without using any solvent. All the synthesized nanoparticles are singlephase in nature, nearly spherical in shape and crystallize in distortedperovskite structure and space group R3c with an average crystallite size ofthe order of 40 nm. The room temperature magnetization observed in BiFeO3nanoparticles is larger than that in the bulk. Increasing Cr doping leads toincrease in the magnetization and coercivity. Strong superexchange interactionbetween Fe3+ and Cr3+ atoms is likely to give rise to such increase inmagnetization with Cr-doping. M\"ossbauer data of these nanoparticles showordered magnetic state in which Fe atoms are in 3+ oxidation states.