Dresden 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 46: Spin: Transport, Orbitronics and Hall Effects I
MA 46.8: Vortrag
Donnerstag, 19. März 2020, 11:30–11:45, HSZ 403
Anomalous spin Hall angle in a metallic ferromagnet determined by a multiterminal spin injection/detection device — •T. Wimmer1,2, B. Coester1, S. Geprägs1, R. Gross1,2,3,4, S. T. B. Goennenwein5, H. Huebl1,2,3,4, and M. Althammer1,2 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2Physik-Department, Technische Universität München, Garching, Germany — 3Nanosystems Initiative Munich (NIM), München, Germany — 4Munich Center for Quantum Science and Technology (MCQST), Schellingstr. 4, D-80799 München — 5Institut für Festkörper- und Materialphysik and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062 Dresden, Germany
The spin Hall effect and its characterizing parameter, the spin Hall angle, is crucial for spin to charge conversion processes in spintronics applications. Here, we report on the determination of the anomalous spin Hall angle in the ferromagnetic metal alloy cobalt-iron (Co25Fe75, CoFe). This is accomplished by measuring the spin injection/detection efficiency in a multiterminal device with nanowires of platinum (Pt) and CoFe deposited onto the magnetic insulator yttrium iron garnet (Y3Fe5O12, YIG). Applying a spin-resistor model to our spin transport data, we determine the transport properties of YIG and the anomalous spin Hall angle of CoFe as a function of its spin diffusion length in a single device. Our experiments reveal a negative anomalous spin Hall angle of the ferromagnetic metal CoFe, but a vanishing ordinary spin Hall angle. Financial support by the DFG is gratefully acknowledged.