Structural and magnetic properties of chromium substituted lithium zinc ferrite nanoparticles

Abstract

The structural and magnetic characteristics of Li0.4Zn0.2CrxFe2.4-xO4(x = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5) ferrites produced via citrate auto-combustion were investigated.Various intriguing modifications in the values of structural factors such as lattice constant, crystallite size, and X-ray density have been detected as the Cr 3+ concentration is raised.X-ray diffraction validated the cubic spinel structure's single phase.The lattice parameter drops as the chromium concentration rises.The wide lines suggest that the particles are nano-sized, and the crystallite size (t) was determined to be between 23 and 29 nm.The estimated crystallite size from Williamson-Hall formula decreased with Cr concentration until x=0.4 and then rises at x=0.5.After annealing the samples at 1000 o C, several magnetic characteristics were tested at ambient temperature.The magnetization M was recorded in the magnetic field up to 5500 Am -1 .In addition, the influence of the applied magnetic field on relative permeability (μr) was discussed.