Visualizing Atomically Layered Magnetism in CrSBr

Daniel J. Rizzo, Alexander S. McLeod, Caitlin Carnahan, Evan J. Telford, Avalon H. Dismukes, Ren A. Wiscons, Yinan Dong, Colin Nuckolls, Cory R. Dean, Abhay N. Pasupathy, Xavier Roy, Di Xiao, D. N. Basov

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

2D materials can host long-range magnetic order in the presence of underlying magnetic anisotropy. The ability to realize the full potential of 2D magnets necessitates systematic investigation of the role of individual atomic layers and nanoscale inhomogeneity (i.e., strain) on the emergence of stable magnetic phases. Here, spatially dependent magnetism in few-layer CrSBr is revealed using magnetic force microscopy (MFM) and Monte Carlo-based simulations. Nanoscale visualization of the magnetic sheet susceptibility is extracted from MFM data and force–distance curves, revealing a characteristic onset of both intra- and interlayer magnetic correlations as a function of temperature and layer-thickness. These results demonstrate that the presence of a single uncompensated layer in odd-layer terraces significantly reduces the stability of the low-temperature antiferromagnetic (AFM) phase and gives rise to multiple coexisting magnetic ground states at temperatures close to the bulk Néel temperature (TN). Furthermore, the AFM phase can be reliably suppressed using modest fields (≈16 mT) from the MFM probe, behaving as a nanoscale magnetic switch. This prototypical study of few-layer CrSBr demonstrates the critical role of layer parity on field-tunable 2D magnetism and validates MFM for use in nanomagnetometry of 2D materials (despite the ubiquitous absence of bulk zero-field magnetism in magnetized sheets).

Original languageEnglish (US)
Article number2201000
JournalAdvanced Materials
Volume34
Issue number27
DOIs
StatePublished - Jul 7 2022

Bibliographical note

Funding Information:
Research at Columbia University and University of Washington was supported as part of the Energy Frontier Research Center on Programmable Quantum Materials funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), under Award No. DE‐SC0019443. R.A.W. was supported by an Arnold O. Beckman Fellowship in Chemical Sciences. A.H.D. was supported by the National Science Foundation graduate research fellowship programme (DGE 16‐44869).

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Keywords

  • 2D magnets
  • 2D materials
  • magnetic force microscopy
  • magnetometry
  • van der Waals materials

PubMed: MeSH publication types

  • Journal Article

Fingerprint

Dive into the research topics of 'Visualizing Atomically Layered Magnetism in CrSBr'. Together they form a unique fingerprint.

Cite this