| Texto completo | |
| Autor(es): |
Pimentel, B.
[1]
;
Andrade, V. M.
[2, 3]
;
de Paula, V. G.
[1]
;
Pirota, K. R.
[2]
;
Beron, F.
[2]
;
Cardoso, M. A.
[4, 5]
;
Goncalves, J. N.
[4, 5]
;
Amaral, J. S.
[4, 5]
;
dos Santos, A. M.
[6]
;
Reis, M. S.
[1]
Número total de Autores: 10
|
| Afiliação do(s) autor(es): | [1] Fluminense Fed Univ, Inst Phys, Av Gal Milton Tavares Souza S-N, BR-24210346 Niteroi, RJ - Brazil
[2] Univ Campinas UNICAMP, Gleb Wataghin Phys Inst, BR-13083970 Campinas, SP - Brazil
[3] Univ Porto, IFIMUP Inst Phys Adv Mat Nanotechnol & Photon, Porto - Portugal
[4] Univ Aveiro, Dept Phys, Univ Campus Santiago, P-3810193 Aveiro - Portugal
[5] Univ Aveiro, CICECO, Univ Campus Santiago, P-3810193 Aveiro - Portugal
[6] Oak Ridge Natl Lab, Neutron Scattering Div, 1 Bethel Valley Rd, Oak Ridge, TN 37831 - USA
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Alloys and Compounds; v. 893, FEB 10 2022. |
| Citações Web of Science: | 0 |
| Resumo | |
The competition between the stability of the cubic and hexagonal full Heusler alloys and the implications concerning their magnetic properties were systematically studied through the detailed structural and magnetic characterization of the Fe2Mn(Si1-xGex) system. This system was specifically chosen as the parent compositions are cubic (x = 0) and hexagonal (x = 1). It is found that the formation of hexagonal phases occurs for the x >= 0.6 samples, whereas its phase fraction monotonically increases with x until the pure hexagonal Fe2MnGe is formed. The change in structure results in high sensitiveness of both the saturation of magnetization (MS) and Curie temperature (TC) with x values, related to a strong magnetocrystalline anisotropy of the hexagonal phase. Both cubic and hexagonal magnetic features were qualitatively reproduced by Density Functional Theory (DFT) calculations. This work provides an experimental and theoretical foundation for further design of Heusler systems with controlled structures and magnetic properties. (c) 2021 Elsevier B.V. All rights reserved. (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 |