Structural and magnetic properties of Al substituted nickel ferrite synthesized by sol-gel auto combustion method

Abstract

Nanoparticals of Al substituted nickel ferrite were synthesized by microwave assisted sol-gel auto combustion method and characterised using X-ray diffraction (XRD), transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). The XRD revealed that the powders obtained are single phase with spinel structure belongs to Fd3m. The average crystallite size calculated using Debey-Scherrer formula found to be in the range of 11–18 nm which were counter verified by using TEM. The magnetic parameters of the synthesized samples were characterised by using VSM. The saturation magnetisation (Ms), coercivity (Hc) was found to decrease with the substitution.