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RESEARCH PRODUCT
Terahertz spectroscopy for all-optical spintronic characterization of the spin-Hall-effect metals Pt, W and Cu80Ir20
Markus MünzenbergOliver GueckstockVasily V. TemnovSamridh JaiswalSamridh JaiswalLukas NadvornikLukas NadvornikTom SeifertTom SeifertMathias KläuiS.m. RouzegarGerhard JakobTobias KampfrathTobias KampfrathMartin WolfN.m. Transubject
Materials scienceAcoustics and Ultrasonics530 Physicsterahertz emission spectroscopyFOS: Physical sciences02 engineering and technology01 natural sciencesTransition metalHall effect0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)ultrafast spincaloritronics010306 general physicsSpectroscopyComputingMilieux_MISCELLANEOUSterahertz emission spectroscopy; terahertz transmission spectroscopy; ultrafast spintronics; ultrafast spincaloritronicsCondensed Matter - Materials ScienceSpintronicsCondensed Matter - Mesoscale and Nanoscale Physicsbusiness.industryRelaxation (NMR)Refractory metalsMaterials Science (cond-mat.mtrl-sci)621021001 nanoscience & nanotechnologyCondensed Matter Physics530 PhysikCondensed Matter::Mesoscopic Systems and Quantum Hall Effect3. Good healthSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsTerahertz spectroscopy and technologyterahertz transmission spectroscopyultrafast spintronicsSpin Hall effect[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Optoelectronics0210 nano-technologybusinessdescription
Identifying materials with an efficient spin-to-charge conversion is crucial for future spintronic applications. In this respect, the spin Hall effect is a central mechanism as it allows for the interconversion of spin and charge currents. Spintronic material research aims at maximizing its efficiency, quantified by the spin Hall angle and the spin-current relaxation length . We develop an all-optical contact-free method with large sample throughput that allows us to extract and . Employing terahertz spectroscopy and an analytical model, magnetic metallic heterostructures involving Pt, W and Cu80Ir20 are characterized in terms of their optical and spintronic properties. The validity of our analytical model is confirmed by the good agreement with literature DC values. For the samples considered here, we find indications that the interface plays a minor role for the spin-current transmission. Our findings establish terahertz emission spectroscopy as a reliable tool complementing the spintronics workbench.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-09-12 |