SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 7: Spin Transport and Orbitronics, Spin-Hall Effects (joint session MA/TT)

TT 7.2: Vortrag

Montag, 27. März 2023, 09:45–10:00, HSZ 403

Controlling 3D spin textures by manipulating sign and amplitude of interlayer DMI with electrical current — •Fabian Kammerbauer¹, Won-Young Choi¹, Freimuth Frank^1,2, Robert Frömter¹, Yuriy Mokrousov^1,2, and Mathias Kläui¹ — ¹Institute of Physics, Joahnnes 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 with perpendicular magnetic anisotropy favors a canting of spins in the in-plane direction [1]. It could thus stabilize exciting spin textures such as Hopfions. A key requirement for nucleation is to control the IL-DMI and so, we investigate the influence of an electric current on the strength of the IL-DMI, as previously found for FMI. The IL-DMI is quantified using out-of-plane hysteresis loops while applying a static in-plane magnetic field at varied azimuthal angles. We observe a shift in the azimuthal dependence with increasing current, which is concluded to originate from the additional in-plane symmetry breaking introduced by the current flow. Fitting the angular dependence we demonstrate the presence of an additive current-induced term [3]. With this, an easily accessible possibility to manipulate 3D spin textures by current is realized.

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

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

[3] Kammerbauer et al, arXiv:2209.01450 (2022)