Structure and Magnetic Properties of Perovskite LaFeO3 Nanocrystals Synthesized Via Reverse Micelle Technique

摘要

Orthorhombic structure perovskite LaFeO3 (LFO) nanoparticles (NPs) were prepared by reverse micelles method. The control of particle size was achieved by varying the water to surfactant molar ratio. The dried precipitate was transformed to pure LaFeO3 phase by calcinations at 750 oC. The average particle size was found to increase with increase in water to surfactant ratio(R). The nanostructure properties were studied by using contact mode of atomic force microscopy (AFM), X-ray diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectrometer (EDS) techniques. These techniques led themselves very well to investigate the structure of NPs and to find out properties and structure on surface of LFO. At room temperature the magnetic properties (M–H) were measured using a vibrating sample magnetometer (VSM) with a maximum magnetic field of 20 kOe.