SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 23: Poster Magnetism I

MA 23.57: Poster

Dienstag, 28. März 2023, 17:00–19:00, P1

Modulation of exchange bias in Fe3GeTe2/CrPS4 van der Waals heterostructures — Aravind P. Balan¹, •Aditya Kumar¹, Ulrich Nowak², and Mathias Kläui¹ — ¹Institute of Physics, Johannes Gutenberg-University Mainz, Staudingerweg 7, Mainz 55128, Germany — ²Department of Physics, University of Konstanz, Universitätsstraße 10, Konstanz 78464, Germany

Exchange bias (EB) is a well-explored phenomenon in thin film systems. The mechanism of exchange bias in such systems is often associated with defects at the interface. Due to the intrinsic layered structure of the 2D materials, they can be mechanically stacked to form heterostructures with extremely clean and flat interfaces. CrPS4 is an A-type anti-ferromagnet that is stable in an ambient atmosphere. Its out-of-plane anisotropy and layered spin structure make it an ideal anti-ferromagnet for inducing exchange bias in a ferromagnet (FM)/antiferromagnet (AFM) van-der Waal (vdW) heterostructures.[1] In this work exchange bias in Fe3GeTe2 (FGT)/ CrPS4 (CPS) heterostructure has been studied using anomalous hall effect measurements. For a clean FGT/CPS interface, an EB of magnitude 50 mT was observed at 5 K with a blocking temperature of 20 K. Interestingly, the introduction of oxidized FGT at the interface modulates the EB considerably. EB in this system could be induced even without the conventional field-cooling, but by just applying a small pre-set field. References : [1] R. Wu et al., Phys. Rev. Applied 17, 064038 (2022) [2] T. Zhang et al., Advanced Science 9.11, 2105483 (2022)