We have investigated the magnetic and microwave absorbing behavior of Ba2Co2Cr2Fe12O22 Nano Particles (NPs)/polyaniline (PANI) and polyacrylonitrile (PAN) nanocomposite materials. Particles showed phase purity and crystallinity in powder X ray diffraction (XRD) analysis. Temperature dependence of magnetic parameters was observed. Microwave absorbing showed very broad and high reflection loss. (C) 2016 Elsevier B.V. All rights reserved.