| Texto completo | |
| Autor(es): |
Santa-Rosa, Washington
[1]
;
da Silva, Jr., Paulo Sergio
[1]
;
M'Peko, Jean-Claude
[2]
;
Amorin, Harvey
[3]
;
Alguero, Miguel
[3]
;
Venet, Michel
[1]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[3] CSIC, ICMM, E-28049 Madrid - Spain
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Applied Physics; v. 125, n. 7 FEB 21 2019. |
| Citações Web of Science: | 1 |
| Resumo | |
The magnetic, magnetostrictive, and electrical properties of Ga- and Mn-doped cobalt ferrite are reported as a function of composition. Materials with improved functionality for magnetoelectric composites are obtained. Magnetic characterizations reveal the effectiveness of the dopants to reduce the typically high magneto-crystalline anisotropy of cobalt ferrite and significantly enhance piezomagnetic coefficients. CoGa0.15Fe1.85O4 ceramic shows large effective piezomagnetic coefficient q(11), 3.9 x 10(-6) kA(-1) m, which is among the highest values reported for cobalt ferrite-based ceramics. Additionally, a two order of magnitude increase of resistivity is found after doping, which makes this material specially suitable for particulate composites. On the contrary, CoMn0.25Fe1.75O4 ceramic has the highest value of q(11) + q(21) (similar to 1.9 x 10(-6) kA(-1) m), which is the relevant parameter for laminated composites. Analytical calculations of the transverse magnetoelectric coefficient alpha(E)(31) for bilayers containing these optimized magnetostrictive phases are also reported, and they demonstrate their high potential for developing new magnetoelectric composites. Published under license by AIP Publishing. (AU) | |
| Processo FAPESP: | 13/00134-7 - Obtenção e aprimoramento das propriedades de compósitos magnetoelétricos livres de chumbo |
| Beneficiário: | Michel Venet Zambrano |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 17/17872-1 - Novos compósitos magnetoelétricos livres de chumbo com alta performance |
| Beneficiário: | Michel Venet Zambrano |
| Modalidade de apoio: | Bolsas no Exterior - Pesquisa |