Berlin 2024 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 78: Spin Transport and Orbitronics, Spin-Hall Effects II (joint session MA/TT)

TT 78.1: Vortrag

Donnerstag, 21. März 2024, 15:00–15:15, EB 107

Controlling the Interlayer Dzyaloshinskii-Moriya Interaction by Electrical Currents — •Fabian Kammerbauer¹, Won-Young Choi¹, Freimuth Frank^1,2, Robert Frömter¹, Yuriy Mokrousov^1,2, and Mathias Kläui¹ — ¹Institute of Physics, Johannes Gutenberg University, Staudingerweg 7, 55128 Mainz, Germany — ²Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany

The recently discovered interlayer Dzyaloshinskii-Moriya interaction (IL-DMI) in multilayers exhibiting perpendicular magnetic anisotropy induces a canting of spins in the in-plane direction, potentially stabilizing intriguing spin textures like Hopfions [1]. Nucleation control becomes pivotal, prompting our exploration into the impact of electric currents on IL-DMI strength--a phenomenon previously established for DMI [2]. To quantify IL-DMI, we use out-of-plane hysteresis loops, applying a static in-plane magnetic field at varied azimuthal angles. A notable observation emerges: a shift in azimuthal dependence with increasing current. This shift is attributed to an additional in-plane symmetry breaking introduced by the electrical current. Detailed fitting substantiates the presence of an additive current-induced term [3]. This unveils a practical avenue for manipulating 3D spin textures on-the-fly via a readily accessible method.

[1] Han et al., Nat. Mater. 18, 703-708 (2019)

[2] Karnad et al., Phys. Rev. Lett. 121, 147203 (2018)

[3] Kammerbauer et al, Nano Lett. 2023, 23, 15, 7070-7075 (2023)

Keywords: DMI; IL-DMI