Synthesis and characterization of Mn₀․₄Zn₀․₆Al₀․₁Fe₁․₉O₄nano-ferrite for high frequency applications

Abstract

Nano-ferrite of composition Mn₀․₄Zn₀․₆Al₀․₁Fe₁․₉O₄ synthesized by co-precipitation method has been reported. The structural studies have been made by using X-ray diffraction (XRD) technique and scanning electron microscopy (SEM), which confirms the formation of single spinel phase and nanostructure. The dc resistivity is studied as a function of temperature and values are found about two times more than those for the samples prepared by the other chemical methods due to stoichiometric composition and better crystal structure of the ferrite. Even at nanolevel, the value of initial permeability is found to be 495 and low magnetic losses make these ferrites especially suitable for high frequency applications. The particle size is calculated using Scherrer’s equation for Lorentzian peak, which comes out between 32-43 nm. Possible mechanisms contributing to these processes have been discussed.