SKM 2021 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 5: Posters Magnetism II

MA 5.5: Poster

Dienstag, 28. September 2021, 10:00–13:00, P

Stability of the skyrmion lattice in Fe_1−xCo_xSi — •Carolina Burger¹, Andreas Bauer¹, Alfonso Chacon¹, Marco Halder¹, Jonas Kindervater¹, Sebastian Mühlbauer², André Heinemann², and Christian Pfleiderer¹ — ¹Physik-Department, Technische Universität München, D-85748 Garching, Germany — ²Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, D-85748 Garching, Germany

We report measurements of the magnetization, susceptibility, and electrical transport on single-crystal Fe_1−xCo_xSi, complemented by small-angle neutron scattering. In small magnetic fields, this compound hosts a hexagonal lattice of topologically non-trivial skyrmions that may persist metastably down to lowest temperatures when field-cooled. We show that signatures characteristic of the skyrmion lattice survive field values up to the field-polarized regime as well as field inversion.
At low temperatures, the Hall effect is dominated by the anomalous contributions, with additional contributions emerging in the vicinity of the magnetic phase transitions hinting towards complex processes associated with the unwinding of the skyrmion lattice.
References: [1] A. Bauer, C. Pfleiderer, and M. Garst, Phys. Rev. B 93 (23), 235144 (2016), [2] A. Bauer, A. Chacon, M. Halder, C. Pfleiderer, Springer Series in Solid-State Sciences 192 (2018), [3] H. Oike, A. Kikkawa, N. Kanazawa, Y. Taguchi, M. Kawasaki, Y. Tokura, and F. Kagawa, Nature Phys. 12, 62 (2016)