Abstract
Abstract We have fabricated flexible films of bismuth ferrite (BFO), terbium manganate (TMO) nanofiller incorporated polyvinyl alcohol (PVA) composite to achieve improved energy storage capacity at room temperature. A systematic observation on capacitance–bias voltage (C–V), ferroelectric and magneto-dielectric properties are done to evaluate the impact of the nanofillers in PVA matrix. BFO-PVA films show enhanced dielectric properties whereas decrement is noticed in TMO-PVA films. Mott-Schottky analysis is used here to understand the dielectric behaviour vividly. The Maxwell-Wagner-Sillars (MWS) type interfacial space charge polarisation causes the electrical polarisation hysteresis loops. The dielectric constant gradually decreases with increasing applied magnetic field. It indicates the negative magneto-dielectric effect of the films. The enhancement in the magneto-dielectric sensitivity is observed in all the composite films than that of pristine PVA.
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