SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 23: Poster Magnetism I

MA 23.1: Poster

Dienstag, 28. März 2023, 17:00–19:00, P1

Lattice effects of the skyrmion compound SrFeO₃ in high magnetic fields — •Mathias Doerr¹, Nikita Andryushin¹, Clara Ebersbach¹, Sergey Granovsky¹, Darren Peets¹, Yuri Skourski², and Dmitro Inosov¹ — ¹Institut für Festkörper- und Materialphysik, TU Dresden, Germany — ²Dresden High Magnetic Field Laboratory, Helmholtz-Zentrum Dresden-Rossendorf, Germany

The magnetic properties of the cubic perovskites ABO₃ (A = alkalis, B = transition metal, e.g. Mn, Fe, Co) strongly depend on lattice variations. In particular, the magnetoelastic properties of SrFeO₃, which is characterised by a variation of topological helical spin structures with the formation of skymions, were investigated in steady and pulsed magnetic fields up to 50 T. Magnetostriction measurements in longitudinal and transversal geometry confirmed lattice distortions in the order of 10⁻⁵ only occur in the domain-selection processes, in these cases with an irreversible character. Other magnetic phase transitions are not triggered by lattice effects. Based on the new data, the (H,T) phase diagram could be refined and supplemented. At the same time, the results show fundamental differences to other perovskites containing Mn or Co on the B-site.