Abstract
The ferroelectric and switching properties of spray deposited sodium nitrite (NaNO2) - poly vinyl alcohol (PVA) composite films on porous silicon template have been analyzed. The image of field emission scanning electron microscope (FE-SEM) shows that the average pore size varies from 800 to 1250 nm with the anodization time of silicon. The remanent polarization of the composite films is dependent on the pore size of the silicon. The optimum value of remanent polarization (Pr) = 41μC/cm2 is observed in NaNO2: PVA composite film for pore size 1250 nm. The switching kinetics of the composite films has been analyzed by different theoretical model. The switching current data are fitted well with infinite-grain model (IGM) in the lower time region and deviate in later time region. The nucleation limited switching (NLS) model gives excellent agreement with the experimental polarization reversal transients throughout the whole time range.
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