Structural, Dielectric and Magnetic studies of Mixed Ferrites of Co-Zn using combustion method

Abstract

Using auto-combustion approach, cobalt ferrite nanoparticles doped with Zn⁺² with the basic chemical composition Zn_xCo_1-xFe₂O₄ (x = 0 to 1: in steps of 0.25) were prepared. Phase confirmation of the proposed samples was confirmed through XRD studies. XRD pattern of the calcined ferrites revealed single phase spinel cubic structure. At room temperature, using HIOKI LCR meter (Model no: 3520-50) the dielectric measurements in the frequency range 10² Hz–10⁶ Hz were performed. Dielectric constant (ε′) and dielectric loss tangent (tan δ) of synthesized nano-materials were investigated as a function of frequency and Zn⁺² concentration at ambient temperature and all the samples exhibited dielectric dispersion. Magnetic measurements for Zn_xCo_1-xFe₂O₄ nano-ferrites were carried out at room temperature using a vibrating sample magnetometer (VSM), and all the samples of the system CoZnFe₂O₄ exhibited ferromagnetic behavior.