Nanospheres of Fe3O4 Synthesis through Solgel Technique and Their Structural & Magnetic  Characterization

Sasikala Sundar; Shakkthivel Piraman

Volume : III, Issue : VII, July - 2013

Nanospheres of Fe3O4 Synthesis through Solgel Technique and Their Structural & Magnetic Characterization

Sasikala Sundar, Shakkthivel Piraman

Abstract :

Magnetite magnetic nanoparticles have been synthesized through sol–gel technique at different precursor concentrations. The synthesized magnetic nanoparticles were annealed at different temperatures (200ºC, 300ºC & 400ºC) and they were analyzed for their structural, morphological, chemical composition and magnetic properties by using Fourier Transform Infrared Spectroscopy (FT–IR), X–ray Diffraction Spectroscopy (XRD), Scanning Electron Microscopy (SEM) measurements and Viating Sample Magnetometer (VSM). The results show that the magnetic Fe3 O4 nanoparticles are of cubic inverse spinel structure, the size of the nanoparticles lies in the range of 8 – 29 nm and crystalline in nature. The morphological and structural phase changes are not revealed by the heat treatment. However, the particle size is increased with increasing annealing temperature and precursor concentration notably. The saturation magnetization values of Fe3 O4 nanoparticles are increased linearly with the annealing temperature to 55 emu/g at 400 ºC.