Electrical transport properties of nano-hexahedral manganese ferrite grafted poly (vinyl alcohol) composite film

Manganese ferrite (MFO) nanoparticles (NPs) of particle size 62 nm and 1.0 wt% manganese ferrite grafted polyvinyl alcohol (MFO-PVA) nanocomposite film are synthesized successfully. Investigation on current conduction mechanisms through MFO-PVA nanocomposite film above room temperature is reported here in detail. Study of electrical properties of MFO NPs shows correlated barrier hopping model to be the dominant charge transport mechanism. Modified Cole-Cole model is well-fitted with the experimentally observed temperature dependent dielectric response of the film sample. A non-Debye type asymmetric behavior is observed. Relaxation time tends to decrease with increasing temperature. Electric modulus spectra are well explained by modified Kohlrausch-Williams-Watts model.