Investigation of the ageing effect on PANI-CSA by conductivity and magnetoresistance measurements

Conductivity (a) vs temperature and magnetoresistance (MR) were measured in CSA-doped-polyaniline films aged for different times. σ is well accounted for in an heterogeneous picture of metallic islands separated by regions in which transport is of hopping type. MR gives evidence for a spin-alignment transport mechanism in these regions.