| Texto completo | |
| Autor(es): |
van Kooten, S. C. P.
[1]
;
Usachev, P. A.
[1, 2]
;
Gratens, X.
[1]
;
Naupa, A. R.
[1]
;
Chitta, V. A.
[1]
;
Springholz, G.
[3]
;
Henriques, A. B.
[1]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil
[2] Ioffe Inst, St Petersburg 194021 - Russia
[3] Johannes Kepler Univ Linz, Inst Halbleiter & Festkorperphys, A-4040 Linz - Austria
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Applied Physics; v. 126, n. 9 SEP 7 2019. |
| Citações Web of Science: | 0 |
| Resumo | |
We present a simple semiclassical model to sustain that in europium chalcogenides (EuX), Faraday rotation (FR) in the transparency gap is proportional to the magnetization of the sample, irrespective of the material's magnetic phase, temperature, or applied magnetic field. The model is validated by FR and magnetization measurements in EuSe in the temperature interval 1.7-300K, covering all EuSe magnetic phases (paramagnetic, antiferromagnetic type I or type II, ferrimagnetic, and ferromagnetic). Furthermore, by combining the semiclassical model with the explicit electronic energy structure of EuX, the proportionality coefficient between magnetization and FR is shown to be dependent only on the wavelength and the bandgap. Due to its simplicity, the model has didactic value; moreover, it provides a working tool for converting FR into magnetization in EuX. The possible extension of the model to other intrinsic magnetic semiconductors is discussed. (AU) | |
| Processo FAPESP: | 16/24125-5 - Controle óptico do magnetismo em semicondutores em escala de tempo ultra-rápida |
| Beneficiário: | Andre Bohomoletz Henriques |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |