First order reversal curve analysis of cobalt-nickel ferrite

Abstract

In this paper Co_1-xNi_xFe₂O₄ in which x ranging from 0.0 to 1.0 with 0.2 intervals was prepared with different particle size using a co-precipitation method. A single phase cubic spinel structure with an average crystallite size between 24 and 34 nm was obtained. X-ray diffraction, fourier transform infrared spectroscopy, field emission scanning electron microscopy and vibration sample magnetometer were used to characterize the samples. The energy dispersive X-ray analysis was in good agreement with the nominal composition. It was found that the functional groups of Co-Ni spinel ferrite were formed during the combustion process. It was found that by substitution of nickel cation in cobalt ferrite, the saturation magnetization and the coercivity decreased from 52.70 emu/g and 1673 Oe to 22.11 emu/g and 134 Oe, respectively. First order reversal curves were employed to map the magneto-static interactions