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. 2024 Jul 17;15:6005. doi: 10.1038/s41467-024-49717-9

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — a Illustration of the experiment involving an all-diamond tip containing a single-spin magnetometer that is scanned over the sample to spatially image magnetic stray fields. b Crystallographic structure of CrSBr, where the magnetic easy (intermediate) axis is aligned along the b(a)-axis of the crystal respectively. c Magnetization image of a non-encapsulated bilayer and trilayer flake (Sample 1, S1_Air ), obtained in a low bias magnetic field ∣B_ext∣ = 5mT. d Magnetization image of an encapsulated multi-layer flake (Sample 2, S2_Encap ), obtained in a bias magnetic field ∣B_ext∣ = 150mT strong enough to induce FM ordering in some bilayer sections. e Exemplary magnetization histograms of encapsulated (top panel) and non-encapsulated (bottom panel) flakes of different thicknesses taken from additional datasets. f Extracted magnetization per CrSBr layer for encapsulated (orange) and non-encapsulated (blue) flakes as a function of the number of layers. The dashed line is the expected value (36 μ_B/nm²) from bulk measurements and the solid black line is a simplified model fit (see text).