Real-time Hall-effect detection of current-induced magnetization dynamics in ferrimagnets.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
28 Jan 2021
28 Jan 2021
Historique:
received:
26
10
2020
accepted:
07
01
2021
entrez:
29
1
2021
pubmed:
30
1
2021
medline:
30
1
2021
Statut:
epublish
Résumé
Measurements of the transverse Hall resistance are widely used to investigate electron transport, magnetization phenomena, and topological quantum states. Owing to the difficulty of probing transient changes of the transverse resistance, the vast majority of Hall effect experiments are carried out in stationary conditions using either dc or ac. Here we present an approach to perform time-resolved measurements of the transient Hall resistance during current-pulse injection with sub-nanosecond temporal resolution. We apply this technique to investigate in real-time the magnetization reversal caused by spin-orbit torques in ferrimagnetic GdFeCo dots. Single-shot Hall effect measurements show that the current-induced switching of GdFeCo is widely distributed in time and characterized by significant activation delays, which limit the total switching speed despite the high domain-wall velocity typical of ferrimagnets. Our method applies to a broad range of current-induced phenomena and can be combined with non-electrical excitations to perform pump-probe Hall effect measurements.
Identifiants
pubmed: 33510163
doi: 10.1038/s41467-021-20968-0
pii: 10.1038/s41467-021-20968-0
pmc: PMC7843968
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
656Références
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