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.