Enhancement in magnetic and electrical properties of Ni substituted Mg ferrite

Abstract

In this work, Ni substituted magnesium spinel ferrites having general formula Mg 1 − x Ni x Fe 2 O 4 (where x = 0.0, 0.1, 0.15, 0.2, 0.25 and 0.3) were synthesized by standard solid state reaction method. All the samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM), DC resistivity measurements. X-ray diffraction analysis confirmed the single spinel phase. The lattice constant decreased with increasing Ni content due to the difference in the ionic radii of Mg 2+ and Ni 2+ ions. The FT-IR spectra reveled two prominent frequency bands in the wave number range of 400 cm −1 to 600 cm −1 , which confirmed the cubic spinel structure of obtained compound and completion of chemical reaction. Magnetic studies revealed that the saturation magnetization increased with the substitution of Ni. The increase in magnetization was explained on the basis of distribution of magnetic and non-magnetic cations among A and B sites of the spinel lattice. A significant influence of cation distribution on DC electrical resistivity and activation energy was observed.

Exploring Study of Magnetic and Electrical Properties of Tl3+ Doped Co0.5Ni0.5Fe2O4 Spinel Ferrites

“…The activation energy of spinel ferrites was determined by using the Arrhenius equation given below (Ramarao et al, 2018):…”

Multiwalled carbon nanotubes crowned with nickel‐ferrite magnetic nanoparticles assisted heterogeneous catalytic strategy for the synthesis of benzo[d]imidazo[2,1‐b]thiazole scaffolds

“…This authenticated the pattern of single-phase face-centered cubic spinel structure without the extra peaks of the other crystallographic phase. [42][43][44] The peaks centered at 26 and 50 corresponding to planes (002) and (003) represent the CNTs fingerprints. [40,44] The presence of the peak to 26.20 (which corresponds to MWCNTs material) on the PXRD pattern of the NiFe 2 O 4 -CNTs composite, indicates the successful formation of the respective hybrid material.…”

“…[42][43][44] The peaks centered at 26 and 50 corresponding to planes (002) and (003) represent the CNTs fingerprints. [40,44] The presence of the peak to 26.20 (which corresponds to MWCNTs material) on the PXRD pattern of the NiFe 2 O 4 -CNTs composite, indicates the successful formation of the respective hybrid material. The sharpness and broad hump of the peaks exhibited the crystalline and amphorous nature of the MWCNTs and its decorating with nickel-ferrite nanoparticles, respectively.…”