Effect of complexant/fuel on the chemical and electromagnetic properties of SiO2-doped Ni-Zn ferrite

The Ni0.5Zn0.5Fe2O4/10 wt.% SiO2 nanocomposites were grown at low temperature using different aqueous solution methods. The sol-gel auto-combustion method used involved complexing agents such as glycine, hydrazine and citric acid in aqueous medium that functioned as a fuel, decomposed the metal complexes at low temperature. FTIR, 29Si CP/MAS NMR, XRD, EPR, SQUID and impedance analyzer measurements were studied the effect of complexant/fuel on the chemical and electromagnetic properties of SiO2-doped Ni-Zn ferrite. The complexing agents in the starting solution influenced the magnetic interaction between Ni-Zn ferrite and silica, and then affected the particle size. Further, the complexing agent type had a direct effect on the EPR parameters (ΔHPP, g-factor, NS and T2), SQUID parameters (Ms, Mr and Hc) and dielectric properties (dielectric constant and loss) of the as-synthesized powder.