Enhanced microwave absorption characteristic of decorated MWCNTs with La0.9Bi0.1Fe0.8Co0.2O3 multiferroic nanoparticles via coating by PEDOT/Polyaniline co-polymer

The microstructural and microwave absorption characteristics of multiferroic nanocomposite (La0.9Bi0.1Fe0.8Co0.2O3 and MWCNTs) coated with PEDOT/Polyaniline co-polymer, was studied systematically. First, MWCNTs/La0.9Bi0.1Fe0.8Co0.2O3 nanocomposite was synthesized using sol-gel auto-ignition and then PEDOT/Polyaniline polymers were coated on MWCNTs/La0.9Bi0.1Fe0.8Co0.2O3 powder via in-situ polymerization method. The effects of the copolymers coating on the structure, morphology, magnetic and electromagnetic performances of the prepared multiferroic nanocomposite surface were comprehensively investigated via XRD, FESEM, VSM and VNA analysis. Enhanced interfacial dielectric relaxation and also perfectly tuned in impedance matching characteristics were achieved by coating nanocomposite with co-polymers. Coating multiferroic nanocomposite with PEDOT/Polyaniline polymers were leading to decrease in matching thickness. Moreover, the significant improvement in microwave absorption properties were also investigated. It was noticed that the coated nanocomposite achieved maximum reflection loss of -60 dB at 11.8 GHz matching frequency with 3.9 GHz bandwidth.