Element-specific visualization of dynamic magnetic coupling in a Co/Py bilayer microstructure.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
04 Nov 2022
04 Nov 2022
Historique:
received:
16
05
2022
accepted:
27
10
2022
entrez:
5
11
2022
pubmed:
6
11
2022
medline:
6
11
2022
Statut:
epublish
Résumé
We present the element-specific and time resolved visualization of uniform ferromagnetic resonance excitations of a Permalloy (Py) disk-Cobalt (Co) stripe bilayer microstructure. The transverse high frequency component of the resonantly excited magnetization is sampled in the ps regime by a combination of ferromagnetic resonance (FMR) and scanning transmission X-ray microscopy (STXM-FMR) recording snapshots of the local magnetization precession of Py and Co with nanometer spatial resolution. The approach allows us to individually image the resonant dynamic response of each element, and we find that angular momentum is transferred from the Py disk to the Co stripe and vice versa at their respective resonances. The integral (cavity) FMR spectrum of our sample shows an unexpected additional third resonance. This resonance is observed in the STXM-FMR experiments as well. Our microscopic findings suggest that it is governed by magnetic exchange between Py and Co, showing for the Co stripe a difference in relative phase of the magnetization due to stray field influence.
Identifiants
pubmed: 36333578
doi: 10.1038/s41598-022-23273-y
pii: 10.1038/s41598-022-23273-y
pmc: PMC9636384
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
18724Subventions
Organisme : Deutsche Forschungsgemeinschaft
ID : 321560838 (OL513/1-1)
Organisme : Austrian Science Fund
ID : I 3050-N36
Informations de copyright
© 2022. The Author(s).
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