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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Modeling the dielectric response of lanthanum modified lead zirconate titanate ferroelectric ceramics-an approach to the phase transitions in relaxor ferroelectrics

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Author(s):
Garcia-Zaldivar, O. [1] ; Pelaiz-Barranco, A. [1] ; Calderon-Pinar, F. [1] ; Fundora-Cruz, A. [1] ; Guerra, J. D. S. [2] ; Hall, D. A. [3] ; Mendoza, M. E. [4]
Total Authors: 7
Affiliation:
[1] Univ La Habana, Inst Ciencia & Tecnol Mat, Fac Fis, Havana 10400 - Cuba
[2] Univ Estadual Paulista, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP - Brazil
[3] Univ Manchester, Sch Mat, Manchester M1 7HS, Lancs - England
[4] Univ Autonoma Puebla, Inst Fis, Puebla 72570 - Mexico
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF PHYSICS-CONDENSED MATTER; v. 20, n. 44 NOV 5 2008.
Web of Science Citations: 9
Abstract

The relaxor behavior of lanthanum modified lead zirconate titanate (PLZT) ferroelectric ceramics, for a La/Zr/Ti ratio of x/60/40, has been analyzed. An approximation to the dynamical behavior of the polar nano-regions (PNRs) has been discussed, taking into account a relaxation model, which considers a distribution function for the relaxation times. A good agreement between theoretical and experimental results was obtained. The behaviors of the mean relaxation time and its standard deviation with temperature were discussed, considering the correlation between the polar nano-regions and the freezing temperature. The temperature dependence of the polarization showed an anomalous behavior around a temperature, which was associated with the freezing temperature, according to the proposed model in the present work. (AU)