Novel Ceramic Materials, Chapter 11

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Synthesis and Characterization of NiFe2O4 Nano Particles Prepared by the Chemical Reaction Method

Y.B.Kannan, R.Saravanan, N.Srinivasan

The present study was carried out to determine the numerical values of the bond strength using the maximum entropy method (MEM) between atoms at various sites, namely tetrahedral – tetrahedral, tetrahedral – octahedral and octahedral – octahedral sites, of interactions in NiFe2O4 nanoparticles prepared by solid state reaction. The experimental lattice parameter agrees well with theoretical lattice parameters. The particle size lies in the nanometer regime. SEM reveals the presence of porosity in the sample. The EDAX and the XRF analysis confirm the elemental composition and purity of the samples. Interestingly, due to the presence of the Yaffet-Kittel angle, instead of the octahedral – octahedral site interactions, the tetrahedral – tetrahedral site interactions remain the strongest interaction in this study. The hysteresis curve together with small coercivity value reveals the presence of small magnetic particles exhibiting a super paramagnetic behavior. The dielectric constant determined through broad band dielectric spectrometer (BDS) shows a normal behavior whereas the dielectric loss tangent shows abnormal behavior. The band gap energy of 2.1eV is evaluated from the optical study.

Keywords
Solid State Reaction Method; Spinel Ferrites; X-Ray Diffraction; Rietveld Analysis; Electron Charge Density using MEM Studies

Published online 6/1/2016, 16 pages

DOI: 10.21741/9781945291036-11

Part of Novel Ceramic Materials

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