Dielectric nonlinearity in a compositionally graded lead zirconate titanate structure

被引：3
|
作者：
Khodorov, A. [1 ]
Rodrigues, S. A. S. [1 ]
Pereira, M. [1 ]
Gomes, M. J. M. [1 ]
机构：
[1] Univ Minho, Dept Phys, P-4710057 Braga, Portugal
来源：
JOURNAL OF APPLIED PHYSICS | 2008年 / 104卷 / 12期
关键词：
dielectric thin films; electric domain walls; lead compounds; permittivity; zirconium compounds;
D O I：
10.1063/1.3040029
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The dielectric response of a compositionally graded lead zirconate titanate (PZT) structure was studied as a function of frequency and amplitude of measuring field. The nonlinear behavior was observed above "threshold" value E-t of electric field strength giving rise to field-dependent dielectric properties. Just above E-t the nonlinearity was well fitted by the empirical Rayleigh relations. The values of Rayleigh coefficients were observed to be different from those of homogenous PZT films. The analysis of the nonlinearity allows us to suggest higher density of domain walls and/or their better mobility in graded structure.
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页数：3
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