Dielectric relaxation and relaxor behavior in bilayered perovskites
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
29/06/2009
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Resumo |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Processo FAPESP: 07/05302-4 Processo FAPESP: 07/00183-7 Sr(0.5)Ba(0.5)Bi(2)Nb(2)O(9) ferroelectric ceramics exhibit a complex dielectric behavior, showing typical relaxor behavior. The relaxation processes are described by the Cole-Cole model [K. S. Cole and R. H. Cole, J. Chem. Phys. 9, 341 (1941)]. At temperatures below 490 K, the dielectric relaxation is associated to the relaxorlike ferroelectric behavior, resulting from the inhomogeneous distribution of barium due to its preference for the bismuth site. Above that, the interaction between the dipoles, which form the microdomains above the relaxor ferroelectric peak and the electrons, which are due to the ionization of the oxygen vacancies are discussed as the probable origin of the relaxation. |
Formato |
3 |
Identificador |
http://dx.doi.org/10.1063/1.3168651 Applied Physics Letters. Melville: Amer Inst Physics, v. 94, n. 26, p. 3, 2009. 0003-6951 http://hdl.handle.net/11449/10135 10.1063/1.3168651 WOS:000267697300036 WOS000267697300036.pdf |
Idioma(s) |
eng |
Publicador |
American Institute of Physics (AIP) |
Relação |
Applied Physics Letters |
Direitos |
closedAccess |
Palavras-Chave | #barium compounds #bismuth compounds #dielectric relaxation #electric domains #ferroelectric ceramics #relaxor ferroelectrics #strontium compounds #vacancies (crystal) |
Tipo |
info:eu-repo/semantics/article |