| Texto completo | |
| Autor(es): |
dos Reis, R. D.
;
Veiga, L. S., I
;
Fabbris, G.
;
Garcia, F.
;
Haskel, D.
;
Gandra, F. C. G.
;
Souza-Neto, N. M.
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Magnetism and Magnetic Materials; v. 560, p. 6-pg., 2022-07-07. |
| Resumo | |
Using the element and orbital selectivity of x-ray absorption spectroscopy at Eu and Pt L-3 edges we investigate the effects of the lattice contraction, induced by temperature and external pressure, on the magnetic and electronic properties of the EuPt2Si2 system. Our findings point to a clear relationship between the volume and the Eu valence in this material. From XANES experiments as a function of pressure we show that the Europium valence tends to stabilize at 3+ for pressures up to 27 GPa. The XMCD results demonstrate that pressure induced valence change of the Europium ion leads to a suppression of the magnetic ordering of the material. Altogether our results provide direct evidence that Eu-4f /5d electronic hybridization effects underlie the mechanism that regulates the valence and magnetic ordering in this material. (AU) | |
| Processo FAPESP: | 18/00823-0 - Novos estados topológicos da matéria sob condições extremas |
| Beneficiário: | Ricardo Donizeth dos Reis |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |