Spinel Co0.5Zn0.5Fe2O4 ferrite was synthesized by polyacrylamide gel method with acrylamide as monomer and N

N′-methylenediacrylamide as lattice agent.Polyaniline(PANI) and PANI/Co0.5Zn0.5Fe2O4 nanocomposites were prapared by in situ polymerization in aqueous solution.The nanocomposites were characterized using Fourier transform infrared spectrometer (FIIR)

Ultraviolet-Visible spectrometer (UV-Vis)

X-ray diffraction (XRD) and Transmission electron microscope (TEM).The results of FIIR and XRD confirmed the formation of PANI and PANI/Co0.5Zn0.5Fe2O4 nanocomposites.The UV\|Vis spectrometer study showed that the absorption peaks of PANI/Co0.5Zn0.5Fe2O4 composite had a red shift of 23 and 5 nm

respectively

as compared with those of PANI.The average particle sizes of PANI and PAN1/Co0.5Zn0.5Fe2O4 were estimated to be about 70 and 90 nm by TEM

respectively.The complex permittivity (ε′-jε″) and the complex permeability (u′-ju″) of the nanocomposites were measured in X\|band (8.2~12.4 GHz).The results showed that PANI/Co0.5Zn0.5Fe2O4 had both electric loss (ε″) and magnetic loss (u″).The ε″ values of PANI/Co0.5Zn0.5Fe2O4 were from 9.2 to 12.3

and the u″ values of PANI/Co0.5Zn0.5Fe2O4 were from 0.15 to 0.16 within 8.2~12.4 GHz.The ε″ values of PANI/Co0.5Zn0.5Fe2O4 were lower than that of pure PANI

whereas the u″ values of PANI/Co0.5Zn0.5Fe2O4 were higher than that of pure PANI.