SKM 2023 – scientific programme

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MA: Fachverband Magnetismus

MA 5: Thin Films: Magnetic Coupling Phenomena / Exchange Bias

MA 5.3: Talk

Monday, March 27, 2023, 10:00–10:15, POT 6

Mesoscale Dzyaloshinskii-Moriya interaction in corrugated ultra-thin asymmetric magnetic layers — •Shahrukh Shakeel, Oleksii M. Volkov, Pavlo Makushko, Eduardo Sergio Oliveros Mata, Denise Erb, Shengqiang Zhou, Juergen Fassbender, and Denys Makarov — Helmholtz-Zentrum Dresden-Rossendorf e. V., 01328 Dresden, Germany

Asymmetrically sandwiching thin magnetic layers with perpendicular anisotropy and Dzyaloshinskii-Moriya interaction (DMI) produces chiral non-trivial textures, e.g. skyrmions and chiral domain walls, which exhibit unexplored application potential in logic and memory devices [1]. Conversely, extrinsic DMI is observed by breaking local inversion symmetry appearing in curvilinear structures of conventional materials [2]. Here, employing ion beam irradiation of SiO2 substrates we fabricate corrugated ultra-thin Cr2O3/Co/Pt asymmetric layer stacks with different geometric parameters. By means of magnetometric and transport measurements, we demonstrate the appearance and controllability of mesoscale DMI [3] by tuning geometric and material parameters of the system.

[1] O. M. Volkov et al., Phys. Rev. Appl. 15, 034038 (2021).

[2] O. M. Volkov et al., Phys. Rev. Lett. 123, 077201 (2019).

[3] O. Volkov et al., Sci. Rep. 8, 866 (2018).