Optical Readout of Reconfigurable Layered Magnetic Domain Structure in CrSBr

Aleksandra Łopion; Pierre-Maurice Piel; Thomas Kliewer; Manuel Terbeck; Jan-Hendrik Larusch; Jakob Henz; Marie-Christin Heißenbüttel; Kseniia Mosina; Thorsten Deilmann; Michael Rohlfing; Zdenek Sofer; Ursula Wurstbauer

arXiv · 2512.04887

Optical Readout of Reconfigurable Layered Magnetic Domain Structure in CrSBr

Aleksandra Łopion·Pierre-Maurice Piel·Thomas Kliewer·Manuel Terbeck·Jan-Hendrik Larusch·Jakob Henz·Marie-Christin Heißenbüttel·Kseniia Mosina·Thorsten Deilmann·Michael Rohlfing·Zdenek Sofer·Ursula Wurstbauer

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Abstract

The van der Waals magnetic semiconductor CrSBr combines multistable magnetic order with strong light--matter coupling, enabling optical access to a rich and reconfigurable layered magnetic domain structure. A purely optical, non-destructive, and non-contact readout of layered magnetic configurations is realized here by magneto-reflectance measurements and interpreted using an optical multilayer model. The magnetic state is tunable by applied magnetic fields and by interfacing CrSBr with the antiferromagnet MnPS$_3$. Applying an external magnetic field along the easy axis drives the hysteretic antiferromagnetic--to--ferromagnetic transition, which is not universally binary but instead develops through a cascade of intermediate magnetic configurations whose multiplicity and stability scale systematically with layer thickness and can be tailored by magnetic interfaces. The intertwined optical and magnetic properties of CrSBr provide a readout mechanism for information encoded in and processed through its magnetic configuration that is compatible with modern on- and off-chip photonic and electronic technologies. These properties identify CrSBr as a promising platform for intelligent matter and for spin-optoelectronics, in particular for neuromorphic architectures that can learn and evolve in response to changing environments.

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Aleksandra Łopion, Pierre-Maurice Piel, Thomas Kliewer, Manuel Terbeck, Jan-Hendrik Larusch, Jakob Henz, Marie-Christin Heißenbüttel, Kseniia Mosina, Thorsten Deilmann, Michael Rohlfing, Zdenek Sofer, Ursula Wurstbauer. 2025-12-04. Optical Readout of Reconfigurable Layered Magnetic Domain Structure in CrSBr. https://arxiv.org/abs/2512.04887

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