Authors: Mintu Tyagi Ratnamala Chatterjee Puneet Sharma
Publish Date: 2015/01/01
Volume: 26, Issue: 3, Pages: 1987-1992
Abstract
In this paper BiFeO3 BFO thin films were synthesized by the sol–gel spincoating technique followed by annealing at different temperatures The effect of annealing temperature on structural optical dielectric and ferroelectric properties of BFO thin film has been investigated Single phase polycrystalline BFO films are confirmed by Xray diffraction patterns A strong dependence of grain size and shape on annealing temperature was observed The optical energy band gap values found decrease from 242 to 227 eV with raise annealing temperature from 500–600 °C respectively The film annealed at 500 °C showed a well saturated polarization–electric field loop The remnant polarization and saturation polarization values are decreased with increasing annealing temperature The anomaly in temperature dependent dielectric permittivity was observed at magnetic transition point
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