Copper ferrite has beenstudied due to its motivating crystallographic and optical properties.Nanoferrites of the general formula Mg0.7Cu0.3Fe2O4were prepared by Citrate- gel auto combustion method. The structure was studied by X-ray diffraction, Brunauer- Emmet-Teller, and Energy dispersive X-ray spectroscopy analyses. The crystallite size was estimated from XRD broadening of (311) peak using Scherer’s formula(Fig.1).The magnetic properties werestudied by carrying out the hysteresis of Mg0.7Cu0.3Fe2O4at different temperatures (100,170,240and 300K) (Fig.2). The investigated samples exhibit low coercivity values indicating that the samples belong to the family of soft ferrites. The magnetization of all samples increases linearly with increasing applied magnetic field up to 5000 Oe. Beyond this applied field, the magnetization attained maximum values and then saturation occured.The band gap energy, which wascalculated from near infrared (NIR) and visible (VIS) reflectance spectra using the Kubelka-Munk function,decreases with increasing the particle size. Furthermore, the band gaps are quite narrow (1.3–1.9eV), hence the investigated samples could act as visible light driven photo catalysts.
 M.A. Amer, T. Meaz, M. Yehia, S.S. Attalah, F. Fakhry, Alloys. Compd. 633, 448–455(2015).
© 2019 MTPR. All Rights Reserved