Ultrafast hot-electron induced quenching of Tb 4 f magnetic order

Abstract : We have investigated ultrafast quenching of the Tb 4f magnetic order in Co 74 Tb 26 alloys, induced by femtosecond hot-electron pulses. The hot-electron pulses were produced in specific nonmagnetic capping layers by infrared femtosecond laser pulses. Our experimental results show that subpicosecond dynamics of Tb 4f magnetic moments can be induced by nonthermal and thermal hot-electron. We further demonstrate that the demagnetization efficiencies of nonthermal and thermal hot-electron are similar. However, the characteristic demagnetization times show values of 0.35 ps for nonthermal hot-electron excitations and 1.2 ps for thermal hot-electron excitations. We explain this temporal elongation by the propagation time of thermal hot-electron through the 15-nm-thick CoTb film.
Type de document :
Article dans une revue
Physical Review B : Condensed matter and materials physics, American Physical Society, 2017, 96 (14), pp.144427 - 144427. 〈10.1103/PhysRevB.96.144427〉
Liste complète des métadonnées

Littérature citée [53 références]  Voir  Masquer  Télécharger

https://hal.univ-lorraine.fr/hal-01624248
Contributeur : Gregory Malinowski <>
Soumis le : jeudi 26 octobre 2017 - 10:16:22
Dernière modification le : jeudi 15 mars 2018 - 01:35:06
Document(s) archivé(s) le : samedi 27 janvier 2018 - 13:34:53

Fichier

2017-Ferte-Ultrafast hot-elect...
Fichiers éditeurs autorisés sur une archive ouverte

Identifiants

Citation

Tom Ferté, Nicolas Bergeard, G. Malinowski, R. Abrudan, T. Kachel, et al.. Ultrafast hot-electron induced quenching of Tb 4 f magnetic order. Physical Review B : Condensed matter and materials physics, American Physical Society, 2017, 96 (14), pp.144427 - 144427. 〈10.1103/PhysRevB.96.144427〉. 〈hal-01624248〉

Partager

Métriques

Consultations de la notice

49

Téléchargements de fichiers

14