ENGINEERING ANTI-FERROMAGNETIC DOMAINS IN 2D CrSBr

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Séminaire de C. Pellet-Mary

University of Basel

14h, 9 Octobre 2025

IJL, Salle Patrick Alnot R+4 (N° 4-A014)

ENGINEERING ANTI-FERROMAGNETIC DOMAINS IN 2D CrSBr

CrSBr is an emerging van der Waals magnet that has been gaining significant attention, as it exfoliates easily

down to the monolayer, and remains stable under ambient conditions. It also supports a relatively high Curie

temperature of 140 K and exhibits magneto-optical coupling through its excitons [1].

A key challenge in working with anti-ferromagnetic (AF) materials is the control and measurement of their

order parameter. In our work [2], we propose a novel method to manipulate the AF order in a CrSBr bilayer

by leveraging lateral exchange interactions within a single crystalline flake.

Using scanning NV center magnetometry in a cryogenic environment [3], we were able to observe for the first

time the presence of AF domains in an atomically thin vdW magnet, and to characterize the structural and

topological properties of the resulting domain walls.

Figure a : Schematics of the lateral exchange protocol used to create anti-ferromagnetic domains.

b : Magnetic imaging of an anti-ferromagnetic domain wall in a CrSBr bilayer.

References

[1] Ziebel, M. E., Feuer, M. L., Cox, J., Zhu, X., Dean, C. R., & Roy, X. (2024). CrSBr: An Air-Stable,

TwoDimensional Magnetic Semiconductor. Nano Lett., 24(15), 4319–4329.

[2] Pellet-Mary, C., Dutta, D., Tschudin, M. A., ...Maletinsky, P. (2025). Lateral Exchange Bias for NéelVector

Control in Atomically Thin Antiferromagnets. ArXiv, 2503.04922.

[3] Thiel, L., Wang, Z., Tschudin, M. A., ...Maletinsky, P. (2019). Probing magnetism in 2D materials

at the nanoscale with single-spin microscopy. Science, 364(6444), 973–976.

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2025_MAT-PULSE_Seminaire_Clément-_9_Oct_

815.86 KiB

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