Abstract
Nickel ferrite nanoparticles were synthesized by Co-precipitation method. The prepared powder was annealed at 500℃, 700℃ and 900℃. XRD analysis was used for composition and structure investigation. The detection and confirmation of the chemical bond in spinel ferrites were investigated by Fourier transmission infrared spectra (FTIR). Also the magnetic properties of the samples were measured by using a vibrating sample magnetometer (VSM). The XRD analysis revealed a pure ferrite phase with high crystallinity. The average crystallite size calculated by Sherrer's equation resulted in variation crystallite size from 9 to 21 nm depending upon the annealing temperature of the samples. FTIR analysis shows the presence of two vibrational bonds between 400-650 cm -1 corresponding to metal-oxygen interaction at tetrahedral and octahedral sites, respectively. Increasing the annealing temperature gave rise to the enhancement of saturation magnetization from 6 to 31emu/gr and the variation of coercivity between 2 and 80Oe.
Highlights
Nanomaterials have received much attention due to their unique properties and various applications which differ from those bulk [1,2,3,4,5]
Spinel ferrites are a group of technologically important magnetic materials of current interest which have the general molecular formula (A2+) [B3+] O42- where A2+ and B3+ are divalent and trivalent cations, respectively, occupying the tetrahedral (A) and octahedral (B) interstitial positions of the fcc lattice formed by O2- ions
The X-ray diffractometer (XRD) studies of the Co-precipitation synthesized NiFe2O4 showed that samples have the spinel structure and the X-ray data agreed well with the reported data [31]
Summary
Nanomaterials have received much attention due to their unique properties and various applications which differ from those bulk [1,2,3,4,5]. The magnetic nanomaterials are more attractive because of their medical, electronic and recording applications. These applications depend on the size, shape, purity and magnetic stability of these materials [6,7]. Spinel ferrites are a group of technologically important magnetic materials of current interest which have the general molecular formula (A2+) [B3+] O42- where A2+ and B3+ are divalent and trivalent cations, respectively, occupying the tetrahedral (A) and octahedral (B) interstitial positions of the fcc lattice formed by O2- ions. Spinel ferrites can be used as antenna rods [8], microwave absorbing materials [9], low
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