| Texto completo | |
| Autor(es): |
Gotardo, R. A. M.
[1]
;
Viana, D. S. F.
[1]
;
Olzon-Dionysio, M.
[1]
;
Souza, S. D.
[1]
;
Garcia, D.
[1]
;
Eiras, J. A.
[1]
;
Alves, M. F. S.
[2]
;
Cotica, L. F.
[2]
;
Santos, I. A.
[2]
;
Coelho, A. A.
[3]
Número total de Autores: 10
|
| Afiliação do(s) autor(es): | [1] Univ Fed Sao Carlos, Dept Fis, BR-13565345 Sao Carlos, SP - Brazil
[2] Univ Estadual Maringa, Dept Fis, BR-87020900 Maringa, Parana - Brazil
[3] Univ Estadual Campinas, Dept Fis Aplicada, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Applied Physics; v. 112, n. 10 NOV 15 2012. |
| Citações Web of Science: | 39 |
| Resumo | |
In this paper structural, electric, magnetic, and Mossbauer spectroscopy studies were conducted in (x) BiFeO3-(1-x) BaTiO3, 0.9 >= x >= 0.3, solid solutions. X-ray diffraction and Rietveld refinement studies indicated the formation of single-phased materials crystallized in a distorted perovskite structure with the coexistence of rhombohedral and monoclinic symmetries. Room temperature ferroelectric hysteresis loops showed that the electric polarization increases with the increase of the BaTiO3 content due to the singular structural evolution of the studied solid solutions. All samples presented weak ferromagnetic ordering, which indicates that the BaTiO3 substitution in the BiFeO3 matrix released the latent magnetization. Mossbauer studies revealed a magnetic spectral signature corresponding to ordered Fe3+ ions, and a decrease of the magnetic hyperfine magnetic fields with the increase of the BaTiO3 content. The composition 0.3BiFeO(3)-0.7BaTiO(3) presented a spectral signature corresponding to a paramagnetic behavior, which strongly suggests that the observed magnetization in this sample is due to the Ti3+ ions. (C) 2012 American Institute of Physics. {[}http://dx.doi.org/10.1063/1.4766450] (AU) | |
| Processo FAPESP: | 08/04025-0 - Materiais multifuncionais multiferróicos nanoestruturados: síntese, propriedades, fenomenologia e aplicações |
| Beneficiário: | José Antonio Eiras |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |