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Current-induced spin torques on single GdFeCo magnetic layers
- Source :
- Advanced Materials, Advanced Materials, Wiley-VCH Verlag, In press, ⟨10.1002/adma.202007047⟩
- Publication Year :
- 2021
- Publisher :
- HAL CCSD, 2021.
-
Abstract
- Spintronics exploits spin-orbit coupling (SOC) to generate spin currents, spin torques, and, in the absence of inversion symmetry, Rashba, and Dzyaloshinskii-Moriya interactions (DMI). 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 by Spin Hall Effect (SHE) and, in turn, exert spin torques on the magnetic layers. Here, we introduce a new class of material architectures, excluding nonmagnetic 5d HMs, for high-performance spintronics operations. We demonstrate very strong current-induced torques exerted on single GdFeCo layers due to the combination of large SOC of the Gd 5d states, and inversion symmetry breaking mainly engineered by interfaces. These "self-torques" are enhanced around the magnetization compensation temperature (close to room temperature) and can be tuned by adjusting the spin absorption outside the GdFeCo layer. In other measurements, we determine the very large emission of spin current from GdFeCo. 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.<br />Comment: 26 pages, 4 figures plus 5 pages of sup. information
- Subjects :
- spin-orbitronics
Materials science
Point reflection
FOS: Physical sciences
02 engineering and technology
010402 general chemistry
7. Clean energy
01 natural sciences
Magnetization
amorphous ferrimagnetic GdFeCo
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Torque
General Materials Science
Absorption (electromagnetic radiation)
Spin-½
spintronics
Condensed Matter - Materials Science
spin-orbit torque
Condensed matter physics
Spintronics
Condensed Matter - Mesoscale and Nanoscale Physics
Mechanical Engineering
Materials Science (cond-mat.mtrl-sci)
021001 nanoscience & nanotechnology
0104 chemical sciences
Coupling (physics)
Mechanics of Materials
slef-torque
Spin Hall effect
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Condensed Matter::Strongly Correlated Electrons
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 09359648 and 15214095
- Database :
- OpenAIRE
- Journal :
- Advanced Materials, Advanced Materials, Wiley-VCH Verlag, In press, ⟨10.1002/adma.202007047⟩
- Accession number :
- edsair.doi.dedup.....d982b4aafb0c3b1860fbfcc8badab148