| Texto completo | |
| Autor(es): |
Cotica, Luiz F.
[1, 2]
;
Santos, Guilherme M.
[1]
;
Freitas, Valdirlei F.
[3]
;
Coelho, Adelino A.
[4]
;
Pal, Madhuparna
[2]
;
Santos, Ivair A.
[1]
;
Garcia, Ducinei
[5]
;
Eiras, Jose A.
[5]
;
Guo, Ruyan
[2]
;
Bhalla, Amar S.
[2]
Número total de Autores: 10
|
| Afiliação do(s) autor(es): | [1] Univ Estadual Maringa, Dept Phys, BR-87020900 Maringa, Parana - Brazil
[2] Univ Texas San Antonio, Dept Elect & Comp Engn, San Antonio, TX 78249 - USA
[3] Univ Estadual Centro Oeste, Dept Phys, BR-85040080 Guarapuava, PR - Brazil
[4] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[5] Univ Fed Sao Carlos, Dept Phys, BR-13565905 Sao Carlos, SP - Brazil
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Applied Physics; v. 117, n. 6 FEB 14 2015. |
| Citações Web of Science: | 2 |
| Resumo | |
It is still a challenging problem to obtain technologically useful materials displaying strong magnetoelectric coupling at room temperature. In the search for new effects and materials to achieve this kind of coupling, a nonlinear magnetoelectric effect was proposed in the magnetically disordered relaxor ferroelectric materials. In this context, the aluminum iron oxide ( AlFeO3), a room temperature ferroelectric relaxor and magnetic spin glass compound, emerges as an attractive lead-free magnetoelectric material along with nonlinear magnetoelectric effects. In this work, static, dynamic, and temperature dependent ferroic and magnetoelectric properties in lead-free AlFeO3 and 2 at.% Nb-doped AlFeO3 multiferroic magnetoelectric compositions are studied. Pyroelectric and magnetic measurements show changes in ferroelectric and magnetic states close to each other ( similar to 200 K). The magnetoelectric coefficient behavior as a function of Hbias suggests a room temperature nonlinear magnetoelectric coupling in both single-phase and Nb-doped AlFeO3-based ceramic compositions. (C) 2015 AIP Publishing LLC. (AU) | |
| Processo FAPESP: | 08/04025-0 - Materiais Multifuncionais Multiferroicos Nanoestruturados: Síntese, Propriedades, Fenomenologia e Aplicações |
| Beneficiário: | José Antonio Eiras |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |