Dielectric nonlinearity in a compositionally graded lead zirconate titanate structure

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

Khodorov, A (Autor) Outra; Rodrigues, SAS (Autor) Outra; Pereira, M (Autor) Outra; Gomes, MJM (Autor) Outra

Revista

Título: Journal of Applied Physics

Vol. 104

ISSN: 0021-8979

Editora: American Institute of Physics

Indexação

ISI Web of Knowledge - 3 Citações

Scopus - 4 Citações

Outras Informações

ID Authenticus: P-003-T7G

DOI: 10.1063/1.3040029

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 3