| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:47 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2002 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
INFLUENCE OF Nb ADDITION ON PLZT THIN FILMS PREPARED BY LASER ABLATION
Authors:
1G. Epurescu, 1N.D. Scarisoreanu,. 1D. Brodoceanu, 2F. Craciun, 3C. Galassi, 2P. Verardi, 1C. Grigoriu, 1M. Dinescu
Affiliation:
1 National Institute for Laser, Plasma and Radiation Physics, PO Box MG–36 Magurele, Bucharest, 76900, Romania, 2CNR-IDAC, Rome, Italy, 3 CNR-IRTEC, Faenza, Italy
E-mail
Keywords:
Abstract:
(Pb0.9La0.1)(Zr0.2Ti0.8)O3 (PLZT) thin films have been deposited by pulsed laser ablation. A parametric study has been performed to evidence the influence of the laser wavelength (265 nm, 355 nm, 530 nm and 1060 nm), laser fluence (2-25 J/cm2), oxygen pressure (0.2-0.8 mbar) and substrate temperature (500-700 0C) on the dielectric constant and on the piezoelectric properties.The structural quality and phase purity was evaluated using X-ray diffraction. The ferroelectric PLZT materials possess one of the highest piezoelectric coefficients in ceramic materials. At higher La concentration (5-7%) these coefficients reach the maximum values. It is shown that the deposition pressure is one of the key parameters in order to obtain films with good properties. A correlation between the response of PLZT and increasing pressure and La concentration is observed.
|
|
|
|