The self-polarization effect in Pb(Zr0.50Ti0.50)O-3 thin films with no preferential orientation

Author(s)

Lima, E. C. ^[1] ; Araujo, E. B. ^[1] ; Bdikin, I. K. ^{[2, 3]} ; Kholkin, A. L. ^{[4, 5]}

Affiliation

^[1] UNESP Univ Estadual Paulista, Dept Fis & Quim, Fac Engn Ilha Solteira, BR-15385000 Ilha Solteira, SP - Brazil

^[2] Univ Aveiro, Dept Mech Engn, P-3810193 Aveiro - Portugal

^[3] Univ Aveiro, TEMA, P-3810193 Aveiro - Portugal

^[4] Univ Aveiro, CICECO, P-3810193 Aveiro - Portugal

^[5] Univ Aveiro, Dept Mat & Ceram, P-3810193 Aveiro - Portugal

• Document type: Journal article
• Source: Materials Research Bulletin; v. 47, n. 11, p. 3548-3551, NOV 2012.
• Web of Science Citations: 13

Abstract

This work demonstrates the existence of a self-polarization effect in Pb(Zr0.50Ti0.50)O-3 thin films with no preferential orientation. Piezoresponse Force Microscopy (PFM) and dielectric measurements were used to study the origin of this effect. The presence of only one peak shifting slightly to the negative side in the piezoresponse histogram indicates the existence of a self-polarization effect in the studied films. An increase in self-polarization was observed when the film thickness increases from 200 nm to 710 nm. The results suggest that Schottky barriers and/or mechanical coupling near the film-electrode interface are not the main mechanisms responsible for the self-polarization effect in the studied films. (c) 2012 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 07/08534-3 - Synthesis and characterization of PZT ultrathin films
• Grantee: Elton Carvalho de Lima
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 10/16504-0 - Influence of extrinsic factors on the properties of PZT ultrathin films
• Grantee: Eudes Borges de Araújo
• Support Opportunities: Regular Research Grants