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TT: Fachverband Tiefe Temperaturen

TT 64: Spin Transport and Orbitronics, Spin-Hall Effects I (joint session MA/TT)

TT 64.7: Vortrag

Donnerstag, 21. März 2024, 11:00–11:15, H 2013

Electrically induced angular momentum flow between separated ferromagnets — •Matthias Grammer^1,2, Richard Schlitz³, Tobias Wimmer^1,2, Janine Gückelhorn^1,2, Luis Flacke^1,2, Sebastian T.B. Goennenwein⁴, Rudolf Gross^1,2,5, Hans Huebl^1,2,5, Akashdeep Kamra⁶, and Matthias Althammer^1,2 — ¹Walther-Meißner-Institut, BAdW, Garching, Germany — ²School of Natural Sciences, TUM, Garching, Germany — ³Department of Materials, ETH Zürich, Zürich, Switzerland — ⁴Department of Physics, University of Konstanz, Konstanz, Germany — ⁵Munich Center for Quantum Science and Technology, München, Germany — ⁶IFIMAC and Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, Spain

The transfer of angular momentum between electrons, magnons and phonons is pivotal for spintronic devices making use of angular momentum currents. Here, we demonstrate angular momentum transfer between two isolated ferromagnetic metal strips on diamagnetic substrates [1]. Experimentally we apply a DC charge current at one of the magnetic electrodes which is converted into an electronic spin current and consequently transfered to the magnonic system. Using the inverse process at the second electrode, we can detect the induced angular momentum flow between the electrodes up to micron distances. We attribute this transfer mechanism to dipolar and potentially phononic interactions.
[1] R. Schlitz et al., arXiv:2311.05290(2023)