| Texto completo | |
| Autor(es): |
Prabhakaran, T.
[1]
;
Mangalaraja, R. V.
[2, 3]
;
Beron, F.
[1]
;
Jimenez, J. A.
[4]
;
Denardin, Juliano C.
[5, 6]
;
Arun, T.
[7]
;
Akbari-Fakhrabadi, Ali
[8]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] State Univ Campinas UNICAMP, Mat & Low Temp Lab, Inst Phys Gleb Wataghin, BR-13083859 Campinas - Brazil
[2] Univ Concepcion, Technol Dev Unit UDT, Coronel Ind Pk, Coronel 4191996 - Chile
[3] Univ Concepcion, Dept Mat Engn, Adv Ceram & Nanotechnol Lab, Fac Engn, Concepcion 4070409 - Chile
[4] Natl Ctr Met Res CENIM CSIC, Dept Met Phys, Madrid 28040 - Spain
[5] Univ Santiago, Dept Phys, Santiago 9170124 - Chile
[6] CEDENNA, Santiago 9170124 - Chile
[7] Univ Atacama, Inst Invest Cient & Tecnol IDICTEC, Copiapo 1410000 - Chile
[8] Univ Chile, Fac Math & Phys Sci, Dept Mech Engn, Adv Mat Lab, Santiago 8370456 - Chile
Número total de Afiliações: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | IEEE Transactions on Magnetics; v. 57, n. 2 FEB 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Developing economically soft magnetic materials for high-performance electrical devices is indispensable. Here, we present the structural and magnetic properties of thermally reduced soft CuFe nanoparticles. The fcc cubic structure of iron-rich Cu37Fe63 and their composition was confirmed by Rietveld refinement. Cu37Fe63 nanoparticles exhibited high saturation magnetization and coercivity of 127 emu/g (142 emu/g) and 43 Oe (31 Oe), respectively, at 300 K (5 K). They showed transitions at similar to 34 and similar to 249 K due to the Kondo temperature of CuFe and minor fraction of CuFe2O4, respectively. The exchange coupling between Cu and Fe was not significant, as demonstrated by field-cooled magnetization curves at 5 K. The magnetocaloric effect (MCE) in the range of fields and temperatures was estimated whereas the maximum MCE of -8.71 x 10(-2) J.kg(-1).K-1 was achieved at 222 K. These soft magnetic materials, which exhibited stable high saturation magnetization with less heating effect during magnetization and demagnetization cycles, would he suitable candidates for magnetic applications. (AU) | |
| Processo FAPESP: | 17/10581-1 - Fenômenos emergentes em sistemas de dimensões reduzidas |
| Beneficiário: | Pascoal Jose Giglio Pagliuso |
| Modalidade de apoio: | Auxílio à Pesquisa - Projetos Especiais |
| Processo FAPESP: | 18/19096-1 - Desenvolvimento de nanoestruturas unidimensionais, intermetálicas e magnetocalóricas, para sistemas de resfriamento com refrigerante magnético eco-amigável |
| Beneficiário: | Prabhakaran Thandapani |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |