NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2013, 4 (3), P. 430–437
EFFECT OF SINTERING TEMPERATURE ON THE STRUCTURAL AND MAGNETIC PROPERTIES OF COBALT FERRITE NANOPARTICLES
Sheena Xavier – Research Department of Physics, Maharaja’s College, Ernakulam, Kerala, India; sheena.xavier1@gmail.com
Smitha Thankachan – Research Department of Physics, Maharaja’s College, Ernakulam, Kerala, India
Binu P. Jacob – Research Department of Physics, Maharaja’s College, Ernakulam, Kerala, India
E.M. Mohammed – Research Department of Physics, Maharaja’s College, Ernakulam, Kerala, India; emmohammed_2005@yahoo.com
Cobalt ferrite nanoparticles have been synthesized by the sol-gel method. The prepared sample was sintered at four different temperatures (300 °C, 400 °C, 500 °C and 700 °C) for four hours. The structural characterizations of all the prepared samples were done using XRD, TEM and FTIR. Crystallite size was found to increase with sintering temperature and this can be attributed to the grain growth of the particles. The particle size of each sample was determined using TEM. The FTIR spectra show two strong absorption bands in the range of 1000–400 cm-1, characteristic of spinel ferrites. The room temperature magnetic measurements showed a strong influence of sintering temperature on saturation magnetization and coercivity.
Keywords: sol gel, ferrites, sintering temperature, magnetic properties.
PACS 81.07.Bc, 61.46.Df, 75.50.Tt