Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 23: Functional Antiferromagnetism
MA 23.12: Talk
Tuesday, March 17, 2020, 12:30–12:45, HSZ 401
Propagation length of antiferromagnetic magnons governed by domain configurations — •Andrew Ross1,2, Romain Lebrun1, Olena Gomonay1, Asaf Kay3, Daniel A. Grave3, Lorenzo Baldrati1, Florian Konst4, Alireza Qaiumzedah5, Arne Brataas5, Avner Rothschild3, Rembert Duine5,6,7, and Mathias Kläui1,2,5 — 1Johannes Gutenberg Universität Mainz, Germany — 2Graduate School of Excellence Materials Science in Mainz, Germany — 3Technion-Israel Institute of Technology, Israel — 4Helmholtz-Zentrum Berlin für Materialien und Energie, Germany — 5Center for Quantum Spintronics, Trondheim, Norway — 6Utrecht University, The Netherlands — 7Eindhoven University of Technology, The Netherlands
Antiferromagnetic (AF) insulators benefit from unparalleled stability in external fields, magnetisation dynamics in the THz range, a lack of stray fields and low Gilbert damping, which should allow for efficient long-range propagation of magnons[1,2]. Here we investigate the underlying mechanisms behind magnon transport in AF thin films. We show efficient spin transport is possible across µm in nm thick thin films, contrary to previous studies reporting nm spin-diffusion lengths [3]. To understand this, we perform XMLD imaging of the AF domains to evidence their role in the propagation of magnons. We achieve efficient control over the AF system and establish the possibility to propagate long-distance spin-waves in AF thin films. [1] Chumak et al., Nature Phys. 11, 6 (2015), [2] Lebrun et al., Nature 561, 222 (2018), [3] Cramer et al., J. Phys. D: Appl. Phys. 51, 14 (2018)