Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 57: Skyrmions IV (joint session MA/TT)

TT 57.2: Vortrag

Donnerstag, 19. März 2020, 09:45–10:00, POT 6

Electrical Transport in FIB microstructures of Mn1.4PtSn — •M. Winter1,2, S. Hamann1,3, J. Gayles3, P. Vir3, M. Uhlarz1, M. König3, C. Felser3, J. Wosnitza1,2, and T. Helm1,31Dresden High Magnetic Field Laboratory (HLD-EMFL), HZDR, Dresden, Germany — 2Institute of Solid State and Materials Physics, TU Dresden, Dresden, Germany — 3Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

Mn1.4PtSn is a half-Heusler compound with tetragonal crystal structure. Only recently, Lorentz transmission electron microscopy measurements have shown that, so-called antiskyrmion phases can be stabilized by applying a magnetic field to the material. Futhermore, it is known that non-trivial magnetic structures such as skyrmions cause a topological contribution to the Hall effect. Therefore, investigations of the electrical transport properties of the material are highly desirable. By using a focused ion beam, we are able to produce samples with submicron feature size, close to the coherence length of the occurring magnetic structures, while maintaining the high quality of a single crystal. This opens the possibility to measure influences of the sample geometry, such as local effects and finite-size effects, on the topological Hall effect caused by the antiskyrmions in Mn1.4PtSn.

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