We report a chemical approach for the in situ synthesis of conducting polymer-magnetic inorganic nanomaterials with the integration of a high temperature organometallic method and a new microemulsion system containing organic, surfactant and aqueous phases that were established to enable the formation of our host nanocomposite materials. Polypyrrole-based γ-Fe 2 O 3 nanocomposites were prepared through this colloidal system. These organic-inorganic nanocomposites were characterized using X-ray diffraction, transmission electron microscopy, thermogravimetric analysis, electrical resistivity and magnetization measurements. It was observed that the blocking temperature increases with increasing the γ-Fe 2 O 3 nanocomponent in these samples. The resistivity and the temperature variation of resistivity have also been investigated.