Dresden 2026 – scientific programme

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MA: Fachverband Magnetismus

MA 43: Spin-Dependent Phenomena in 2D

MA 43.4: Talk

Thursday, March 12, 2026, 10:30–10:45, POT/0112

Origin of Exchange Bias in Compensated and Orthogonal Spin Interfaces in vdW Heterostructures — •Aditya Kumar¹, Aravind Balan¹, Patrick Reiser², Sadeed Hameed¹, Thibaud Denneulin³, Rafal E. Dunin-Borkowski³, Patrick Maletinsky², and Mathias Kläui¹ — ¹Institute of Physics, Johannes Gutenberg University Mainz, Staudinger Weg 7, 55128 Mainz, Germany — ²Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland — ³Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute, Forschungszentrum Jülich, 52425 Jülich, Germany

Van der Waals heterostructures formed by mechanical stacking can create atomically flat, defect-free interfaces, yet exhibit exchange bias in expected compensated and orthogonal spin configurations. This work investigates the underlying spin-pinning mechanisms in heterostructures of out-of-plane ferromagnet Fe3GeTe2 interfaced with c-type out-of-plane antiferromagnet MnPS3 and in-plane a-type antiferromagnet CrSBr. Using NV magnetometry and STEM holography imaging, we reveal distinct exchange bias origins: the spin reorientation transition in MnPS3 induces large, robust exchange bias, while orthogonal coupling at the Fe3GeTe2/CrSBr interface generates circular flux closure domains that produce switchable exchange bias. ^[1] A. P. Balan et al., Advanced Materials 36, 2403685 (2024). ^[2] A. Kumar et al., Small 21, e06284 (2025).

Keywords: Exchange bias; Van der Waals; NV magnetometry; Interface; STEM Holography