Ferroelectric bismuth titanate films by hot wall metalorganic chemical vapor deposition
- 1 June 1993
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 73 (11) , 7910-7913
- https://doi.org/10.1063/1.353943
Abstract
Ferroelectric bismuth titanate thin films were successfully deposited on Si, sapphire disks, and Pt/Ti/SiO2/Si substrates by hot wall metalorganic chemical vapor deposition. Triphenyl bismuth [Bi(C6H5)3] and titanium ethoxide [Ti(C2H5O)4] were used as the precursors. The deposition rates were in the range of 3.9–12.5 nm/min. The Bi/Ti ratio was easily controlled by precursor temperature, carrier gas flow rate, and deposition temperature. As-deposited films were pure Bi4Ti3O12 phase. The films were specular and showed uniform and fine grain size. Optical constants as a function of wavelength were calculated from the film transmission characteristics in the ultraviolet-visible-near infrared (UV-VIS-NIR) region. The 550 °C annealed film showed a spontaneous polarization of 26.5 μC/cm2 and a coercive field of 244.3 kV/cm.This publication has 7 references indexed in Scilit:
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