Structural and Magnetic Properties of Nanocrystalline Copper Ferrites Synthesized by Sol-gel Autocombustion Method

Abstract

Nanocrystalline copper ferrites are conventionally synthesized by the sol-gel auto combustion method using metal nitrates and citric acid for different temperatures. In this work, X-ray diffractometry (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) and vibration sample magnetometry were used to characterize the samples. XRD and selected-area electron diffraction pattern indicates, the synthesized nanocrystalline particles have only the inverse spinel structure without presence of any other phase impurities. Nanocrystalline particles in the range 22-85 nm obtained depending on calcined temperature. FTIR spectra shows, the position of absorption bands are found to be particle size dependent. In magnetic studies, saturation magnetisation increases and coercivity decreases by increasing temperature