Anomaly in the conductivity relaxation parameters at the phase transition of ferroelectric materials: A time domain study

Autor(es)

Leyet, Y. ^[1] ; Guerrero, F. ^[1] ; Amorin, H. ^[2] ; Guerra, J. de Los S. ^[3] ; Eiras, J. A. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Oriente, Dept Fis, Fac Ciencias Nat, Santiago De Cuba - Cuba

^[2] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid - Spain

^[3] Univ Fed Uberlandia, Inst Fis, BR-38400902 Uberlandia, MG - Brazil

^[4] Univ Fed Sao Carlos, Dept Fis, Grp Ceram Ferroeletr, BR-13565670 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Applied Physics Letters; v. 97, n. 16 OCT 18 2010.
• Citações Web of Science: 6

Resumo

The influence of the ferroelectric to paraelectric transition on the relaxation parameters of conductive processes in ferroelectric materials is studied in the time domain. Three well-known ferroelectric systems were chosen with transition temperatures in different regions, these are, high-temperature PbNb(2)O(6)-based ceramics; nanostructured Pb(Zr(0.6)Ti(0.4))O(3) ceramics; and submicron BaTiO(3). The thermal evolution of relaxation parameters shows clear anomalies in their typical behavior when conductivity processes arise in the temperature range where the ferroelectric transition takes place. The method here described allows obtaining information about the correlation between charge transport and the motion of the off-center ions at the phase transition. (C) 2010 American Institute of Physics. {[}doi: 10.1063/1.3505932] (AU)

• Processo FAPESP: 08/04023-7 - Fidel Guerrero Zayaz | Universidad de Oriente - Cuba
• Beneficiário: José Antonio Eiras
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional