Ferroelectric properties of sol-gel derived thin solid film of barium titanate on ITO-glass

Ferroelectric thin films of BaTiO3 were prepared by a sol-gel technique on ITO-glass substrates and annealed at 650 degreesC for 30 seconds in a rapid thermal processor (RTP) with O(2)atmosphere. X-ray diffraction (XRD), atom ic force microscopy (AFM) and transmission spectroscopy were used to study the surface morphology and the microstructure of the films, and the results showed that the films were well crystallized. crack-free. smooth, and high ly transparent in the visible-near infrared spectral zone. The ferroelectri c properties of the films have been studied. A butterfly CV loop was observ ed and a remnant polarization of P-r=6.3 mu C/cm(2) and a coercive field of E-c=8.4 kV/cm were determined from the ferroelectric hysteresis loop.