Fabrication of Ferroelectric Thin Films using 355nm Pulsed Laser

Abstract

Barium titanate (BTO) is an interesting/well-known ferroelectric material due to the existence of ferroelectric properties at room temperature, which makes it very useful for potential devices. Already prepared pure BTO pellets used to synthesis Thin Films. Pulsed Laser Deposition (PLD) method is used to synthesis Thin Films, in this work 355nm Pulsed Laser is used and the aim of this is to check how this range of laser effect the properties of the Thin Film prepared at different temperatures. The structure of the prepared films is investigated using XRD analysis. For the study of morphology of the films SEM and AFM analysis were carried out. Specifically, SEM analysis is for how the films look like and for grain size analysis. AFM analysis is for roughness of the films, the height and phase images, 3-D images, and line measurement were carried out to investigate the roughness of the films. Optical properties and bandgap studies of all the pure BTO have been carried, these results were found to be consistent and within the spectral range of 2.2 eV to 3.6 eV. Increase in the synthesis temperature of the thin films resulted in the decrease of band gap and increase smoothness of the films.