Dresden 2020 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 14: General Spintronics
MA 14.7: Vortrag
Montag, 16. März 2020, 16:30–16:45, HSZ 401
Magnon transport in three-terminal magnetically ordered insulator/platinum nanostructures — •Janine Gückelhorn1,2, Tobias Wimmer1,2, Sudhir Regmi3, Arunava Gupta3, Stephan Geprägs1, Hans Huebl1,2,4, Rudolf Gross1,2,4, and Matthias Althammer1,2 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2Physik-Department, Technische Universität München, Garching, Germany — 3University of Alabama, Center for Materials for Information Technology MINT and Department of Chemistry, Tuscaloosa, AL, USA — 4Munich Center for Quantum Science and Technology (MCQST), München, Germany
The transport of information via spin waves (magnons) in magnetically ordered insulators provides novel routes for information processing. We present our results of the transport of magnons in the ferrimagnetic insulators (FMI) nickel ferrite (NFO), and yttrium iron garnet (YIG). In our experiments, we deposit three electrically isolated platinum (Pt) strips on top of our FMI thin films. The outer Pt strips act as spin current injector and detector. The center strip is utilized to modulate the magnon transport via a charge current. In the injector and modulator strip the charge current flow controls the magnon density in the FMI via the spin Hall effect and thermal Joule heating. We systematically study the magnon transport in NFO and YIG as a function of applied magnetic field and temperature. Moreover, we compare these results to simultaneous spin Hall magnetoresistance measurements.
Financial support by the DFG (AL2110/2-1) is acknowledged.