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MA: Fachverband Magnetismus
MA 29: Skyrmions II
MA 29.13: Vortrag
Mittwoch, 19. März 2025, 18:15–18:30, H20
Intrinsic non-reciprocity in skyrmion dynamics in synthetic antiferromagnet — •Mona Bhukta1, Takaaki Dohi1, Fabian Kammerbauer1, Maria-Andromachi Syskaki1,2, Duc Minh Tran1, Markus Weigand3, Sebastian Wintz3, Simone Finizio4, Jörg Raabe4, Robert Frömter1, and Mathias Kläui1 — 1Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany — 2Singulus Technologies AG, 63796 Kahl am Main, Germany. — 3Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 14109 Berlin, Germany — 4Paul Scherrer Institut, Swiss Light Source, Forschungsstrasse 111 5232 PSI Villigen, Switzerland.
In this work, we investigate the dynamics of isolated AFM skyrmion tubes in synthetic antiferromagnetic (SyAFM) multilayers composed of 30-50 ferromagnetic (FM) layers, antiferromagnetically coupled via the interlayer exchange interaction. Using element-specific time-resolved scanning transmission X-ray microscopy (STXM), we demonstrate the current-induced dynamics of the resulting AFM skyrmions. In uncompensated SyAFM, we observe a current-polarity-dependent, non-reciprocal skyrmion Hall effect of individual AFM skyrmions, arising from the unique intrinsic properties of the hybrid chiral skyrmion tubes in the flow regime. This nonreciprocity can be tuned by the degree of magnetic compensation and vanishes in highly compensated SyAFM [1]. References [1] T. Dohi, M. Bhukta, et al., Observation of a non-reciprocal skyrmion Hall effect of hybrid chiral skyrmion tubes in synthetic antiferromagnetic multilayers,arxiv (2024).
Keywords: Synthetic antiferromagnet; SkHE; Hybrid skyrmion