Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 51: Spin Transport and Orbitronics, Spin-Hall Effects II (joint session MA/TT)
MA 51.8: Talk
Thursday, March 12, 2026, 16:45–17:00, POT/0361
Disentangling angular momentum transport in ferromagnet-diamagnet structures via suspended systems — •Fiona Sosa Barth1,2, Matthias Grammer1,2, Richard Schlitz3, Tobias Wimmer1,2, Janine Gückelhorn1,2, Luis Flacke1,2, Sebastian T.B. Goennenwein3, Rudolf Gross1,2,4, Hans Huebl1,2,4, Akashdeep Kamra5, and Matthias Althammer1,2 — 1Walther-Meißner-Institut, BAdW, Garching, Germany — 2School of Natural Sciences, TUM, Garching, Germany — 3Department of Physics, University of Konstanz, Konstanz, Germany — 4Munich Center for Quantum Science and Technology, München, Germany — 5RPTU Kaiserslautern-Landau, Kaiserslautern, Germany
Spintronics relies on the transfer of angular momentum between electrons and solid state excitations such as magnons and phonons. In our recent work, we demonstrate angular momentum transfer between two ferromagnetic strips on diamagnetic substrates [1]. A DC current on one of the strips is converted into a non-equilibrium magnon accumulation, which transfers angular momentum to the magnonic system of the second FM strip, detected electrically by the inverse processes. In this work, we investigate how the nature of this angular momentum transport is affected by the substrate. We first examine how SiOx, SiN and SiN/SiOx layers on Si substrates impact the transport response, and then study the effect in freestanding ferromagnetic strips fully decoupled from the substrate. This allows us to separate potential dipolar from phononic contributions to the coupling between the FM strips. [1] R. Schlitz et al., Phys. Rev. Lett. 132, 256701 (2024)
Keywords: Spintronics; Angular momentum; Ferromagnetic strips; Freestanding strings; Diamagnetic substrate