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DS: Fachverband Dünne Schichten

DS 7: Spins in Molecular Systems: Strategies and Effects of Hyperpolarization

DS 7.5: Vortrag

Mittwoch, 19. März 2025, 11:00–11:15, H14

Employing CISS for Modification of Skyrmion Diffusion and Size — •Fabian Kammerbauer¹, Yael Kapon², Theo Balland¹, Shira Yochelis², Yossi Paltiel², and Mathias Kläui¹ — ¹Institut für Physik, Johannes-Gutenberg-Universität Mainz, 55099 Mainz, Germany — ²Institute of Applied Physics, Faculty of Sciences, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel

Chirality-induced spin selectivity (CISS) is a phenomenon that has garnered significant attention due to its ability to generate large spin polarizations in organic molecules and its associated effects, such as the magnetic switching of ferromagnets induced by chiral molecules [1]. In hybrid systems, these chiral molecules have been found to influence magnetic properties, including changes in the magnetization [2]. This study explores the interaction between chiral molecules, specifically alpha-helix polyalanine, and chiral spin structures such as magnetic skyrmions. The skyrmions are stabilized in ferromagnetic/heavy metal multilayers via the Dzyaloshinskii-Moriya interaction [3]. Through magneto-optic Kerr effect imaging, we demonstrate that chiral polypeptides can alter the stability of skyrmions by shifting the temperature and magnetic field ranges where they remain stable. Furthermore, we reveal the impact of chiral molecules on skyrmion size and thermal skyrmion diffusion.

[1] R. Naaman et al. Nat. Rev. Chem. 3, 250 (2019)

[2] Y. Kapon et al. J. Chem. Phys. 159, 064701 (2023)

[3] K. Everschor-Sitte et al. J. Appl. Phys. 124, 240901 (2018)

Keywords: CISS; Magnetism; Skyrmions; Thin Films