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journal article·2023-11Open access

Magnetic Imaging and Domain Nucleation in CrSBr Down to the 2D Limit

Yishay Zur, Avia Noah, Carla Boix‐Constant, Samuel Mañas‐Valero, Nofar Fridman, Ricardo Rama‐Eiroa, Martin E. Huber, Elton J. G. Santos, Eugenio Coronado, Yonathan Anahory

Advanced Materials· Volume 35· Issue 47
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Abstract

Abstract Recent advancements in 2D materials have revealed the potential of van der Waals magnets, and specifically of their magnetic anisotropy that allows applications down to the 2D limit. Among these materials, CrSBr has emerged as a promising candidate, because its intriguing magnetic and electronic properties have appeal for both fundamental and applied research in spintronics or magnonics. In this work, nano‐SQUID‐on‐tip (SOT) microscopy is used to obtain direct magnetic imaging of CrSBr flakes with thicknesses ranging from monolayer (N = 1) to few‐layer (N = 5). The ferromagnetic order is preserved down to the monolayer, while the antiferromagnetic coupling of the layers starts from the bilayer case. For odd layers, at zero applied magnetic field, the stray field resulting from the uncompensated layer is directly imaged. The progressive spin reorientation along the out‐of‐plane direction (hard axis) is also measured with a finite applied magnetic field, allowing evaluation of the anisotropy constant, which remains stable down to the monolayer and is close to the bulk value. Finally, by selecting the applied magnetic field protocol, the formation of Néel magnetic domain walls is observed down to the single‐layer limit.
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Research context

Nanomaterials

OpenAlex topics: 2D Materials and Applications · MXene and MAX Phase Materials · Graphene research and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

The Racah Institute of Physics The Hebrew University Jerusalem 9190401 Israel

Center for Nanoscience and Nanotechnology Hebrew University of Jerusalem Jerusalem 91904 Israel

Instituto de Ciencia Molecular (ICMol) Universitat de València Catedrático José Beltrán 2 Paterna 46980 Spain

Donostia International Physics Center (DIPC) Basque Country Donostia‐San Sebastián 20018 Spain

Institute for Condensed Matter Physics and Complex Systems School of Physics and Astronomy University of Edinburgh Edinburgh EH93FD UK

Departments of Physics and Electrical Engineering University of Colorado Denver Denver CO 80217 USA

Higgs Centre for Theoretical Physics University of Edinburgh Edinburgh EH93FD UK

Funding

European Research Council · Federación Española de Enfermedades Raras · Generalitat Valenciana · Engineering and Physical Sciences Research Council · Israel Science Foundation · H2020 Marie Skłodowska-Curie Actions · Networks of Centres of Excellence of Canada · Graphene Flagship · H2020 European Research Council

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