| Full text | |
| Author(s): |
Santa-Rosa, Washington
[1]
;
da Silva, Jr., Paulo Sergio
[1]
;
M'Peko, Jean-Claude
[2]
;
Amorin, Harvey
[3]
;
Alguero, Miguel
[3]
;
Venet, Michel
[1]
Total Authors: 6
|
| Affiliation: | [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
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Journal of Applied Physics; v. 125, n. 7 FEB 21 2019. |
| Web of Science Citations: | 1 |
| Abstract | |
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) | |
| FAPESP's process: | 13/00134-7 - Obtaining and improvement of properties of lead free magnetoelectric composites |
| Grantee: | Michel Venet Zambrano |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 17/17872-1 - New lead free magnetoelectric composites with high performance |
| Grantee: | Michel Venet Zambrano |
| Support Opportunities: | Scholarships abroad - Research |