Structural, Magnetization and UV-Visible Study of Mn-Co-Ni Ferrite System

Abstract

Polycrystalline Mn-Co-Ni ferrite was synthesized by solid state reaction method at 950 ºC. X-ray diffraction pattern indicates that specimen has a cubic spinel type structure with lattice constant varies from 8.321 Å to 8.329 Å, X-ray density was calculated 5.39 g/cm³ to 5.36 g/cm³ and approximate particle size was found 36 nm. Magnetic measurements was carried out using VSM at room temperature (RT) where saturation magnetization (M_s) was found 55 emu/g to 42.19 emu/g, coercive field (H_c) was found 165 Oe to 88 Oe and magnetic moment (μ_B) was found from 2.30 μ_B to 1.75 μ_B. UV-visible measurement was recorded the maximum absorption was found at wavelength 213 nm to 222 nm and direct optical band gap found 3.32 eV to 3.96 eV.