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MA: Fachverband Magnetismus
MA 28: Cooperative Phenomena: Spin Structures and Magnetic Phase Transitions
MA 28.2: Vortrag
Mittwoch, 19. März 2025, 15:15–15:30, H19
Simulating magnetostriction in skyrmion-hosting MnSc2S4 — •Justus Grumbach1, Mahmood Deeb1, Sergey Granovsky1, Lilian Prodan2, Vladimir Tsurkan2, Martin Rotter3, and Mathias Doerr1 — 1Institut für Festkörper- und Materialphysik, TU Dresden, 01062 Dresden — 2Experimentalphysik V, Universität Augsburg, 86135 Augsburg — 3McPhase Projekt, 01159 Dresden
Measurements of neutron scattering on MnSc2S4 explored an antiferromagnetic skyrmion state [1]. We measured the magnetostriction and found curves with characteristic anomalies. To find out which is linked to skyrmions, we performed mean field Monte Carlo simulations with the McPhase program package using the hamiltonian introduced earlier [1].
We could resemble main properties of the experimental outcome. The exact location of the skyrmionic state in the phase diagram and the discovery of a new 2q structure between the skyrmion state and saturation in field were new informations gained by these simulations.
Simulations and experimental results introduce a link of magnetostriction and skyrmions by a plateau-like non-distorted region, which could also be found in other compounds.
[1] S. Gao et al.: Fractional antiferromagnetic skyrmion lattice induced by anisotropic couplings. Nature, 586:37, 2020.
Keywords: McPhase; Dilatometry; Monte Carlo; Skyrmions