Ionized oxygen vacancy-related electrical conductivity in (Pb1-xLax) (Zr0.90Ti0.10)(1-x/4)O-3 ceramics

Autor(es)

Pelaiz-Barranco, A. ^{[1, 2]} ; Guerra, J. D. S. ^[2] ; Lopez-Noda, R. ^[3] ; Araujo, E. B. ^[2]

Afiliação do(s) autor(es)

^[1] Univ La Habana, Fac Fis, Inst Ciencia & Tecnol Mat, Havana 10400 - Cuba

^[2] Univ Estadual Paulista UNESP, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP - Brazil

^[3] ICIMAF, Inst Cibernet Matemat & Fis, Dept Fis Aplicada, Havana 10400 - Cuba

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS D-APPLIED PHYSICS; v. 41, n. 21 NOV 7 2008.
• Citações Web of Science: 53

Resumo

The electrical conductivity behaviour in the paraelectric state has been investigated in lanthanum modified lead zirconate titanate (PLZT) ceramics, considering the universal relaxation law. The contribution of conductive processes to the dielectric response for the low-frequency range was discussed taking into account the oxygen vacancies mechanism. The activation energies for the thermally hopping and conductivity processes were obtained. The results for the frequency dependence of the conductivity suggest at the oxygen vacancy hopping processes, due to relaxations in oxygen vacancy-related dipoles, being mainly responsible for the conduction behaviour in the studied system. (AU)

• Processo FAPESP: 06/60013-5 - Investigação das propriedades dielétricas lineares e não lineares em materiais ferroelétricos (cerâmicos e filmes finos)
• Beneficiário: José de los Santos Guerra
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores