Quantifying exchange forces of a spin spiral on the atomic scale.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
05 Mar 2020
05 Mar 2020
Historique:
received:
14
08
2019
accepted:
13
02
2020
entrez:
7
3
2020
pubmed:
7
3
2020
medline:
7
3
2020
Statut:
epublish
Résumé
The large interest in chiral magnetic structures for realization of nanoscale magnetic storage or logic devices has necessitated methods which can quantify magnetic interactions at the atomic scale. To overcome the limitations of the typically used current-based sensing of atomic-scale exchange interactions, a force-based detection scheme is highly advantageous. Here, we quantify the atomic-scale exchange force field between a ferromagnetic tip and a cycloidal spin spiral using our developed combination of current and exchange force detection. Compared to the surprisingly weak spin polarization, the exchange force field is more sensitive to atomic-scale variations in the magnetization. First-principles calculations reveal that the measured atomic-scale variations in the exchange force originate from different contributions of direct and indirect (Zener type) exchange mechanisms, depending on the chemical tip termination. Our work opens the perspective of quantifying different exchange mechanisms of chiral magnetic structures with atomic-scale precision using 3D magnetic exchange force field measurements.
Identifiants
pubmed: 32139680
doi: 10.1038/s41467-020-15024-2
pii: 10.1038/s41467-020-15024-2
pmc: PMC7057993
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1197Subventions
Organisme : EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020)
ID : 818399
Organisme : Deutsche Forschungsgemeinschaft (German Research Foundation)
ID : SFB677
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