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MA: Fachverband Magnetismus
MA 7: Poster Magnetism I
MA 7.13: Poster
Monday, March 9, 2026, 09:30–12:30, P2
Magnetic properties of Mn3Sn layer systems — •Paul Marschall1, Wolfgang Hoppe1, Prajwal Rigvedi2, Banabir Pal2, Georg Woltersdorf1, and Stuart Parkin2 — 1Martin Luther University Halle-Wittenberg, Institute of Physics, Halle (Saale), Germany — 2Max Planck Institute of Microstructure Physics, Halle (Saale), Germany
Illuminating a nanometer thin metallic bilayer consisting of a ferromagnetic (FM) and a non-magnetic layer (NM) with an intense femtosecond laser pulse launches an ultrafast spin current from the FM into the NM layer where it is subsequently converted into a charge current pulse via the inverse spin Hall effect. This system is established as a so called spintronic terahertz emitter (STE) usable either as a source for THz radiation [1] or for on-chip ultrafast current pulses [2]. The polarity of radiation or current can be fully inverted by switching the magnetization of the FM layer. In this study we focus on the magnetic cluster moment of the non-collinear antiferromagnet Mn3Sn [3] replacing the FM layer of the canonical STE. The on-chip ultrafast current pulses generated by single Mn3Sn layers or Mn3Sn|Pt layer systems are measured with the help of a fast sampling oscilloscope and coplanar microwave probe tip [2]. The conducted experiments allow to analyze the reorietation of the in-plane magnetic cluster moment due to external magnetic fields.
[1] T. Seifert et al., Nat. Photon. 10, 483-488 (2016)
[2] W. Hoppe et al., ACS Appl. Nano Mater. 4, 7454-7460 (2021)
[3] B. Pal et al., Sci. Adv. 8, eabo5930 (2022)
Keywords: chiral antiferromagnet; Mn3Sn; ultrafast demagnetization; STE; spin Hall effect