Abstract
We report here on the unique synthesis of BiFeO 3 (BFO) nanocrystals of different size by using oleic acid as a capping agent and investigate the structural and magnetic properties. Oleic acid is found to be a good stabilizing agent to obtain different crystal size and distributions of BFO nanocrystals. Structural characterizations by X-ray diffraction (XRD) reveal the phase purity of all the samples. The BFO nanocrystals display strong size dependent magnetic properties showing increase in both magnetization ( M s ) as well as in coercive field ( H c ) with decreasing the crystal size due to the size confinement effect as well as change in magnetocrystalline anisotropy. The smallest BFO nanocrystal of size ~12 nm shows remarkably high (8.17 emu/g) magnetization value compared to previous reports. The results obtained here will be of immense important for advanced applications in electromagnetic devices.
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