Effect of Polyaniline on Magnetic and Microwave Absorption Properties in SrFe12O19/Zn0.4Co0.2Ni0.4Fe2O4 Ferrite Nanocomposites

Abstract

Polyaniline PANI/(SrFe12O19)(1-x)/(Co0.8Ni0.2Fe2O4)(x) (x = 0.2, 0.4, 0.6, 0.8) composites were prepared via the in situ polymerization process. The structure, morphology and electromagnetic absorption properties of samples were studied. XRD (x-ray diffractometer), FESEM (field emission scanning electron microscopy), and FTIR (field transform infrared) analyses demonstrated that SrFe12O19/Zn0.4Co0.2Ni0.4Fe2O4 ferrite particles were covered by PANI coating. VSM measurement revealed by adding non-magnetic polymer (PANI), magnetic features of aimed composites declined. The electromagnetic absorption of synthesized samples was measured by VNA. In the frequency range of 8.2–12.4 GHz (X-Band), the reflection loss improved to − 28.5 dB from − 2.93 dB composites of PANI/(SrFe12O19)0.2/(Zn0.4Co0.2Ni0.4Fe2O4)0.8 in comparison to (SrFe12O19)0.2/(Zn0.4Co0.2Ni0.4Fe2O4)0.8. Due to the perfect impedance matching between PANI as the dielectric part, and ferrites in the case of the magnetic part, the reflection loss decreased in PANI/(SrFe12O19)(1-x)/(Co0.8Ni0.2Fe2O4)(x) composites. The minimum reflection loss of the PANI/SrFe12O19/Zn0.4Co0.2Ni0.4Fe2O4 composites was − 28.6 dB at the frequency of 11.5 GHz.