Please use this identifier to cite or link to this item:
- Dielectric relaxation and relaxor behavior in bilayered perovskites
- Univ La Habana
- Universidade Estadual Paulista (UNESP)
- Universidade Federal de Goiás (UFG)
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
- Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
- CNPq: 450070/2008-5
- CNPq: 301382/2006-9
- FAPESP: 07/05302-4
- 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.
- Applied Physics Letters. Melville: Amer Inst Physics, v. 94, n. 26, p. 3, 2009.
- American Institute of Physics (AIP)
- barium compounds
- bismuth compounds
- dielectric relaxation
- electric domains
- ferroelectric ceramics
- relaxor ferroelectrics
- strontium compounds
- vacancies (crystal)
- Acesso restrito
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.