Switching of a Magnet by Spin-Orbit Torque from a Topological Dirac Semimetal.
ferromagnets
magnetization switching
spin-orbit torque
topological Dirac semimetals
topological quantum materials
topological surface states
Journal
Advanced materials (Deerfield Beach, Fla.)
ISSN: 1521-4095
Titre abrégé: Adv Mater
Pays: Germany
ID NLM: 9885358
Informations de publication
Date de publication:
Jun 2021
Jun 2021
Historique:
received:
30
08
2020
pubmed:
4
5
2021
medline:
4
5
2021
entrez:
3
5
2021
Statut:
ppublish
Résumé
Recent experiments show that topological surface states (TSS) in topological insulators (TI) can be exploited to manipulate magnetic ordering in ferromagnets. In principle, TSS should also exist for other topological materials, but it remains unexplored as to whether such states can also be utilized to manipulate ferromagnets. Herein, current-induced magnetization switching enabled by TSS in a non-TI topological material, namely, a topological Dirac semimetal α-Sn, is reported. The experiments use an α-Sn/Ag/CoFeB trilayer structure. The magnetization in the CoFeB layer can be switched by a charge current at room temperature, without an external magnetic field. The data show that the switching is driven by the TSS of the α-Sn layer, rather than spin-orbit coupling in the bulk of the α-Sn layer or current-produced heating. The switching efficiency is as high as in TI systems. This shows that the topological Dirac semimetal α-Sn is as promising as TI materials in terms of spintronic applications.
Identifiants
pubmed: 33938060
doi: 10.1002/adma.202005909
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e2005909Subventions
Organisme : U.S. Department of Energy
Organisme : Office of Science
Organisme : Basic Energy Sciences
ID : DE-SC0018994
Organisme : U.S. National Science Foundation
ID : EFMA-1641989
Organisme : U.S. National Science Foundation
ID : ECCS-1915849
Organisme : National Natural Science Foundation of China
ID : 11734006
Organisme : National Natural Science Foundation of China
ID : 11974165
Organisme : U.S. National Science Foundation
ID : DMR-1710512
Organisme : Basic Energy Sciences
ID : DE-SC0020074
Organisme : Basic Energy Sciences
ID : DE-SC0021281
Informations de copyright
© 2021 Wiley-VCH GmbH.
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