Relaxor ferroelectric behavior: An approach considering both the dipolar and electrical conductivity contributions

Autor(es)

Carreras-Casas, C. ^[1] ; Garcia-Zaldivar, O. ^[1] ; Pelaiz-Barranco, A. ^[1] ; Gonzalez-Abreu, Y. ^[1] ; Calderon-Pinar, F. ^[1] ; Guerra, J. D. S. ^[2]

Afiliação do(s) autor(es)

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

^[2] Univ Fed Uberlandia, Inst Fis, Grp Ferroeletr & Mat Multifuncionais, BR-38408100 Uberlandia, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ADVANCED DIELECTRICS; v. 11, n. 03 JUN 2021.
• Citações Web of Science: 1

Resumo

The relaxor behavior of PLZT ferroelectric ceramics has been analyzed in a wide frequency and temperature ranges, below and above the temperature for the formation of the so-called polar nano-regions (PNRs). An approximation to the dynamical behavior of the PNRs has been discussed using Cole-Cole's relaxation model and Jonscher's Universal Relaxation Law. The analysis considers both the dipolar contribution and those ones associated with DC and AC electric conductivities, this latter not being previously reported in the literature for relaxor materials. The effectiveness of the developed model has been verified from the agreement between the experimental data and the theoretical calculations. This study also offers an indirect method to predict the DC component of the electrical conductivity. (AU)

• Processo FAPESP: 18/24352-7 - Desenvolvimento e Estudo de Materiais Eletro-cerâmicos com Interesse Tecnológico
• Beneficiário: Antônio Carlos Hernandes
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Brasil
• 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