Synthesis and electrical properties of (Bi1/2Na1/2)TiO3 (BNT) ferroelectric thin films by liquid sprayed mist chemical vapor deposition technique

Abstract

This study aims to synthesize lead-free ferroelectric material, (Bi1/2Na1/2)TiO3 using the Liquid Sprayed Mist Chemical Vapor Deposition (LSMCVD) technique. The mist of precursor solution was vaporized and deposited on two different substrates of Si(100) and (111)Pt/TiO2/SiO2/Si(100) in an oxygen atmosphere. The deposition temperature and time were varied in the range of 400-600 degrees C and 30-90 min. (Bi1/2Na1/2)TiO3 thin film had preferred orientations of (110). The thickness of the thin film deposited was 35-162 nm. The remnant polarization (2P(r)) and the dielectric constant were 4.6-16.8 mu C/cm(2), 325-350, respectively.