Effect of calcinations on the structural and magnetic properties of magnesium ferrite nanoparticles prepared by sol gel method |
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| Institution: | 1. Research and Development Centre, Bharathiar University, Coimbatore, Tamilnadu, 641046, India;2. Department of Physics, Thiru. Vi. Ka. Government Arts and Science College, Thiruvarur, Tamilnadu, 610003, India;1. Department of Physics, Faculty of Science, Ain shams University, Cairo 11566, Egypt;2. Central Metallurgical Research and Development Institute (CMRDI), Tebbin, P.O. Box 87, Helwan, Egypt |
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| Abstract: | Magnesium ferrite nanoparticles calcined at 300 °C, 350 °C, 400 °C, 450 °C were synthesized by sol-gel method. The effects of calcinations on the cation distribution, structural and magnetic properties have been investigated. X-ray diffraction (XRD) and vibrating scanning magnetometer (VSM) were used to characterize the structural and magnetic properties. X-ray diffraction analysis revealed the formation of single phase MgFe2O4 in all the samples. Lattice constant and crystallite size increased with calcination. X-ray diffraction data were used to estimate the average cationic distribution among A site and B site. Cationic distribution shows that there is migration of cation between tetrahedral A site and octahedral B site. Saturation magnetization increased with particle size. Coercivity decreased with calcination temperature as a result of decrease in pinning effect at the grain boundary. Curie temperature (TC) decreased slightly due to weakening of A-B exchange interaction. Low temperature magnetic measurement revealed that blocking temperature (TB) increased due to strong magnetic interaction. |
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