Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 37: Focus Session: Insulator Spintronics
MA 37.8: Vortrag
Mittwoch, 3. April 2019, 19:00–19:15, H38
All-electrical control of spin transport in a three-terminal yttrium iron garnet/platinum nanostructure — •T. Wimmer1,2, M. Althammer1,2, L. Liensberger1,2, N. Vlietstra1, S. Geprägs1, M. Weiler1,2, R. Gross1,2,3, and H. Huebl1,2,3 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching, Germany — 2Physik-Department, Technische Universität München, Garching, Germany — 3Nanosystems Initiative Munich (NIM), München, Germany
The transport of information via spin waves (magnons) in ferromagnetic materials provides novel, intriguing pathways towards information processing and manipulation beyond charge-based semiconductor technology. Here, the investigation of the transport of magnons in transistor like structures is of key importance.
In this study, we investigate the transport and control of magnon spin currents using an all-electrical detection and manipulation scheme. To this end, we utilize three parallelly aligned, electrically isolated platinum (Pt) electrodes deposited on a 13 nm thin yttrium iron garnet (YIG) film. The outer Pt contacts act as spin current injector and detector while the center one realizes the control of the magnon conductance. All electrodes use the (inverse) spin Hall effect to act on the magnon system. We are able to control the magnon spin conductance by up to 60 %/mA. Most interestingly, in addition to the linear control of the magnon transport, we find a highly non-linear regime to the spin conductance modulation.
Financial support by the DFG is gratefully acknowledged.