Comparison of Ni0.6Co0.4Fe2O4 and NiFe2O4 Nanoparticles for Magnetic Characteristics, Synthesized Using Co-Precipitation Method

Abstract

Comparison of nickel Ni_0.6Co_0.4Fe₂O₄   and NiFe₂O₄ were studied. The co-precipitation method was performed for the whole sample. After annealing of 600°C for 4 hours, the nanoparticles samples evaluated their structural properties by using Fourier Transform Infra-Red (FTIR) and X-Ray Diffraction (XRD). The XRD pattern confirms that the whole samples have the crystalline structure of the face-centered cubic (fcc) inverse spinel. Furthermore, the lattice and crystallite size of NiFe₂O₄ increased when added Co²⁺. The FTIR spectrum showed two prominent absorption bands, i.e., at around k of 358 cm^-1 and 588 cm^-1, where metals at tetrahedral and octahedral sites reflect intrinsic vibrations, respectively.  Finally, the decrease of saturated magnetization M_S from 22.2 emu/g and 9.92 emu/g replacement of Co²⁺ cation with Ni²⁺.