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MA: Fachverband Magnetismus

MA 12: Skyrmions I

MA 12.10: Vortrag

Montag, 18. März 2024, 17:30–17:45, EB 301

Exploring the variety of chiral magnetic textures in Mn_1.4PtSn — •M. Winter^1,2,3, M.C. Rahn⁴, A.S. Sukuhanov⁴, S. Schneider², A. Tahn², D. Pohl², P. Vir¹, T. Helm⁶, A. Thomas⁴, A. Pignedoli⁸, M. Azhar⁸, K. Everschor-Sitte⁸, J. Geck⁴, G. van der Laan⁷, T. Hesjedal^5,7, C. Felser¹, and B. Rellinghaus² — ¹MPI CPfS, Dresden, Germany — ²DCN, TU Dresden, Germany — ³IFW Dresden, Germany — ⁴IFMP, TU Dresden, Germany — ⁵Univ. Oxford, UK — ⁶HZDR, Dresden, Germany — ⁷Diamond Light Source, UK — ⁸Univ. Duisburg-Essen, Germany

Combining in-situ Lorentz transmission electron microscopy (LTEM) and resonant elastic x-ray scattering (REXS) allows for an unambiguous correlation of magnetic scattering patterns with their underlying real space magnetic textures. We have applied this approach to explore the rich variety of magnetic textures emanating from basic chiral motifs in Mn_1.4PtSn. Supported by theoretical calculations and micromagnetic simulations, our experiments show that stripe domains, which are stabilized by the uniaxial magnetic anisotropy, rather than the so far assumed helical phase constitute the magnetic ground state of the material. Upon applying an external magnetic field, the stripe domains transform into a magnetic fan state or a chiral soliton lattice, depending on whether the field is applied within the plane of the anisotropic DMI or perpendicular to it, respectively. The findings allow to understand the kinetic pathways towards the formation of both non-topological bubbles and antiskyrmion lattices in Mn_1.4PtSn. The work is supported by DFG (SPP2137) and by MPG (IMPRS-CPQM).

Keywords: antiskyrmion; REXS; LTEM; Heusler; chiral soliton lattice