Regensburg 2025 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
MA: Fachverband Magnetismus
MA 43: Skyrmions III / Non-Skyrmionic Magnetic Textures II
MA 43.10: Talk
Friday, March 21, 2025, 12:00–12:15, H16
Gate-Voltage-Induced Changes of the Magnetic Properties of Skyrmion-Hosting Gd/Fe Multilayers — •Sebastian Hofmann1, Steffen Wittrock2, Tamer Karaman1, Sascha Petz2, Daniel Metternich2, Krishnanjana Puzhekadavil Joy2, Kai Litzius1, and Felix Büttner1,2 — 1Universität Augsburg Institut für Physik, Universitätsstraße 1, 86159 Augsburg — 2Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin
Ionic gating has recently emerged as a versatile method to induce large and controllable changes of the local magnetic properties of thin films. This allows, for example, to manipulate the existence [1] and chirality [2] of magnetic skyrmions. However, existing gating experiments have focused on ultrathin films, where skyrmions are usually micron sized. Here, we show that ionic gating with oxygen and hydrogen can be used to control ferrimagnetic Gd/Fe multilayer materials with thicknesses of more than 40 nm, in which sub-100 nm skyrmion can be observed. We find that ionic gating can shift the compensation temperature by more than 100 K, i.e., by a similar magnitude as in sub-10 nm thick films [3]. However, unlike ultrathin films, our thicker materials exhibit vertical variation of magnetic properties, suggesting a pathway toward gate-control of spin textures in 3D. [1] Yang, S. et al. Adv. Mat. 2208881 (2022). [2] Fillion, C.-E. et al. Nat. Comm. 13, 5257 (2022). [3] Huang, M. et al. Nat. Nanotechnol. 16, 981 (2021).
Keywords: Ionic Gating; Skyrmions; Ferrimagnets