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RESEARCH PRODUCT
Room temperature antiferromagnetic resonance and inverse spin-Hall voltage in canted antiferromagnets
Arne BrataasIsabella BoventerHaakon T. SimensenRomain LebrunAbdelmadjid AnaneMathias KläuiMathias Kläuisubject
Spin pumpingMaterials scienceCondensed matter physicsCondensed Matter - Mesoscale and Nanoscale PhysicsTerahertz radiation530 PhysicsGeneral Physics and AstronomyResonanceFOS: Physical sciencesObservable530 PhysikCondensed Matter::Mesoscopic Systems and Quantum Hall Effect01 natural sciencesCondensed Matter::Materials ScienceFerrimagnetismHall effect0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)AntiferromagnetismCondensed Matter::Strongly Correlated Electrons010306 general physicsSpin (physics)description
We study theoretically and experimentally the spin pumping signals induced by the resonance of canted antiferromagnets with Dzyaloshinskii-Moriya interaction and demonstrate that they can generate easily observable inverse spin-Hall voltages. Using a bilayer of hematite/heavy metal as a model system, we measure at room temperature the antiferromagnetic resonance and an associated inverse spin-Hall voltage, as large as in collinear antiferromagnets. As expected for coherent spin pumping, we observe that the sign of the inverse spin-Hall voltage provides direct information about the mode handedness as deduced by comparing hematite, chromium oxide and the ferrimagnet yttrium-iron garnet. Our results open new means to generate and detect spin currents at terahertz frequencies by functionalizing antiferromagnets with low damping and canted moments.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-03-31 |