| Texto completo | |
| Autor(es): |
Pelaiz-Barranco, A.
[1]
;
Guerra, J. D. S.
[2]
;
Garcia-Zaldivar, O.
[1]
;
Calderon-Pinar, F.
[1]
;
Araujo, E. B.
[2]
;
Hall, D. A.
[3]
;
Mendoza, M. E.
[4]
;
Eiras, J. A.
[5]
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Univ La Habana, Fac Fis, Inst Ciencia & Tecnol Mat, Havana 10400 - Cuba
[2] Univ Estadual Paulista, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP - Brazil
[3] Univ Manchester, Sch Mat, Manchester M1 7HS, Lancs - England
[4] Univ Autonoma Puebla, Inst Fis, Puebla 72570 - Mexico
[5] Univ Fed Sao Carlos, Dpto Fis, BR-13565905 Sao Carlos, SP - Brazil
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Materials Science; v. 43, n. 18, p. 6087-6093, OCT 2008. |
| Citações Web of Science: | 24 |
| Resumo | |
Lanthanum modified lead zirconate titanate ceramics with lanthanum content changing from 2 to 6 at% La and a Zr/Ti ratio of 90/10 (PLZT x/90/10) have been analyzed by using X-ray diffraction, dielectric response, differential scanning calorimetry, and ferroelectric hysteresis. An antiferroelectric state was found to be stabilized, whereas the long-range ferroelectric state was disrupted by lanthanum substitution on the lead sites. A ferroelectric state is shown to be stable over an antiferroelectric state for low lanthanum contents in a wide temperature range, where both phases coexist. With the increase of the lanthanum concentration, the long-range coherency of the ferroelectric state is suppressed, i.e., the temperature range of the ferroelectric state stability decreased, disappearing for x > 3 at% La. (AU) | |
| 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 |