Parts | Days | Selection | Search | Updates | Downloads | Help
MA: Fachverband Magnetismus
MA 11: Posters Magnetism III
MA 11.30: Poster
Wednesday, September 29, 2021, 13:30–16:30, P
Magnon transport in YIG/Pt nanostructures with reduced effective magnetization — •Janine Gückelhorn1,2, Tobias Wimmer1,2, Manuel Müller1,2, Stephan Geprägs1, Hans Hübl1,2,3, Rudolf Gross1,2,3, and Matthias Althammer1,2 — 1Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Garching, Germany — 2Physik-Department, Technische Universität München, Garching, Germany — 3Munich Center for Quantum Science and Technology (MCQST), München, Germany
The transport of information via spin waves (magnons) in magnetically ordered insulators provides novel paths for information processing. For applications based on pure magnonic spin currents damping effects resulting in a decrease of the corresponding conductivity, have to be minimized. Here, we investigate the magnon transport through an yttrium iron garnet (YIG) thin film with strongly reduced effective magnetization. Utilizing three-terminal Pt strip devices allow us to manipulate the magnon transport between the two outer strips via an additional charge current applied to the center electrode. Most importantly, above a certain threshold current, where damping compensation via spin torque is reached, the effective magnon conductivity can be enhanced by a factor of up to six. Another major observation is the linear dependence of the threshold current on the applied magnetic field. We attribute these observations to the reduced effective magnetization and the associated nearly circular mangetization precession.
Financial support by the DFG via project AL2110/2-1 and Germany's Excellence Strategy -- EXC-2111 -- 390814868 is acknowledged.