The present paper reports the Synthesis of polyaromatic amine-ferromagnetic composite with nanosize TiO2 (similar to 70-90 nm) and gamma-Fe2O3 (similar to 10-15 nm) particles via in situ emulsion polymerization. Magnetic and conductivity studies demonstrate that the conducting ferromagnetic composite possesses saturation magnetization (M-s) value of 26.9 emu g(-1) and conductivity of the order of 0.46 S cm(-1), which are measured by vibrating sample magnetometer and four-probe technique, respectively. It is observed that the presence of the nanosized gamma-Fe2O3 in the polyaniline-TiO2 matrix affects the electromagnetic shielding property of the composite. Polyaniline-TiO2-gamma-Fe2O3 nanocomposite has shown better shielding effectiveness due to absorption (SEA similar to 45 dB)than the polyaniline-gamma-Fe2O3 (SEA similar to 8.8 dB)and polyaniline-TiO2 (SEA similar to 22.4 dB) nanocomposite. The polymer composites were further characterized by high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) technique. (C) 2009 Elsevier B.V. All rights reserved.