The Influence of Zn Substitution on Physical Properties of CoFe₂O₄ Nanoparticles

Abstract

Co1−xZnxFe2O4 nanoparticles (0 ≤ x ≤ 1) have been synthesized via a green sol–gel combustion method. The prepared samples were studied using X-ray diffraction measurements (XRD), transmission electron microscopy (TEM), Raman, and magnetic measurements. All samples were found to be single phases and have a cubic Fd-3m structure. EDS analysis confirmed the presence of cobalt, zinc, iron, and oxygen in all studied samples. Raman spectra clearly show that Zn ions are preferentially located in T sites for low Zn concentrations. Due to their high crystallinity, the nanoparticles show high values of the magnetization, which increases with the Zn content for x MNPs as the H is increased from 20 to 60 kA/m.

Keywords

• zinc–cobalt ferrite nanoparticles
• Raman measurements
• magnetic properties