Current-Induced Spin Torques on Single GdFeCo Magnetic Layers.
amorphous ferrimagnetic GdFeCo
spin-orbit torque
spin-orbitronics
spintronics
Journal
Advanced materials (Deerfield Beach, Fla.)
ISSN: 1521-4095
Titre abrégé: Adv Mater
Pays: Germany
ID NLM: 9885358
Informations de publication
Date de publication:
Mar 2021
Mar 2021
Historique:
revised:
20
12
2020
received:
15
10
2020
pubmed:
20
2
2021
medline:
20
2
2021
entrez:
19
2
2021
Statut:
ppublish
Résumé
Spintronics exploit spin-orbit coupling (SOC) to generate spin currents, spin torques, and, in the absence of inversion symmetry, Rashba and Dzyaloshinskii-Moriya interactions. The widely used magnetic materials, based on 3d metals such as Fe and Co, possess a small SOC. To circumvent this shortcoming, the common practice has been to utilize the large SOC of nonmagnetic layers of 5d heavy metals (HMs), such as Pt, to generate spin currents and, in turn, exert spin torques on the magnetic layers. Here, a new class of material architectures is introduced, excluding nonmagnetic 5d HMs, for high-performance spintronics operations. Very strong current-induced torques exerted on single ferrimagnetic GdFeCo layers, due to the combination of large SOC of the Gd 5d states and inversion symmetry breaking mainly engineered by interfaces, are demonstrated. These "self-torques" are enhanced around the magnetization compensation temperature and can be tuned by adjusting the spin absorption outside the GdFeCo layer. In other measurements, the very large emission of spin current from GdFeCo, 80% (20%) of spin anomalous Hall effect (spin Hall effect) symmetry is determined. This material platform opens new perspectives to exert "self-torques" on single magnetic layers as well as to generate spin currents from a magnetic layer.
Identifiants
pubmed: 33604960
doi: 10.1002/adma.202007047
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e2007047Subventions
Organisme : Agence Nationale de la Recherche
ID : ANR-18-CE24-0008
Organisme : Agence Nationale de la Recherche
ID : ANR-19-CE24-0016-01
Organisme : Agence Nationale de la Recherche
ID : ANR-17-CE24-0025
Organisme : Lorraine Université d'Excellence
ID : ANR-15IDEX-04-LUE
Organisme : Academic Research Fund Tier 3
ID : MOE5093
Organisme : National Research Foundation
ID : NRF-NRFI2015-04
Organisme : FEDER
Organisme : Grand Est Region
Organisme : National Research Foundation Singapore
ID : NRF-NRFI2015-04
Informations de copyright
© 2021 Wiley-VCH GmbH.
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