Dresden 2020 – scientific programme

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MA: Fachverband Magnetismus

MA 57: Posters Magnetism II

MA 57.21: Poster

Thursday, March 19, 2020, 15:00–18:00, P3

Ferromagnetic resonance of Mn1.6PtSn thin films — •Peter Swekis^1,2, Anastasios Markou¹, Jörg Sichelschmidt¹, Sebastian T.B. Gönnenwein^2,3, and Claudia Felser¹ — ¹Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany — ²Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany — ³Center for Transport and Devices of Emergent Materials, Technische Universität Dresden, 01062 Dresden, Germany

Inverse tetragonal Mn-based Heusler-type compounds can host topological non-coplanar spin textures, such as antiskyrmions in Mn_1.4Pt_0.9Pd_0.1Sn[1], that affect the electromagnetic properties in unconventional ways[2]. Investigation of the host materials and the underlying exchange mechanisms, such as the anisotropy, is therefore of utmost importance in order to control and understand the formation of those textures. The dynamic response to gigahertz frequencies becomes particularly interesting and has to be examined.

We studied Mn1.6PtSn thin films of various thicknesses (20-100 nm) with cavity FMR (X-Band and Q-Band) as well as broadband FMR to determine damping, g-factor, effective magnetization, anisotropy constants and temperature dependence.

[1] A.K. Nayak et. al., Nature 548, 561 (2017)

[2] P. Swekis et. al., PRM 3, 013001(R) (2019)