Physics Department, Faculty of Science, Mansoura University, P.O. Box 55, 35516, Mansoura, Egypt
The prepared polystyrene (PS) films filled with different filling levels (FLs) of AgNO3 were studied. The X-ray diffraction (XRD) scans exhibited two main characteristic peaks, the amorphous and the polymerization peaks. The evolution of these two peaks with filling was discussed. The infrared (IR) transmission spectra were recorded where the most notably PS characterizing peaks were assigned. Certain IR peaks were taken as an evidence for the formation of polaron and/or bipolaron states in the polymeric matrix. The direct current (dc) electrical conduction mechanism was discussed on the bases of the modified interpolaron hopping model. The temperature dependence of the dc magnetic susceptibility obeyed Curie – Weiss law. The obtained positive values of the paramagnetic Curie temperature suggest the existence of a ferromagnetic exchange interaction at low temperatures. The electron spin resonance (ESR) spectra displayed weak and very narrow signals. The magnetic centers responsible of the observed narrow ESR signals can basically be assigned to delocalized or mobile polarons formed during filling.
PACS: 70: 71.20.Rv.: 76.30.-v
Polystyrene, AgNO3 filler, X-ray diffraction, Infrared, Electrical resistivity, Magnetic susceptibility, Electron spin resonance
