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The van der Waals magnets CrX3 (X = I, Br, and Cl) exhibit highly tunable magnetic properties and are promising candidates for developing novel two-dimensional (2D) spintronic devices such as magnetic tunnel junctions and spin tunneling transistors. Previous studies of CrCl3 have mainly focused on mechanically exfoliated samples. Controlled synthesis of high quality atomically thin flakes is critical for their technological implementation but has not been achieved to date. Here, we report the growth of large CrCl3 flakes down to monolayer thickness via the physical vapor transport technique. Both isolated flakes with well-defined facets and long stripes of tri-layer samples with length exceeding 60 µm have been obtained. High-resolution transmission electron microscopy studies show that the CrCl3 flakes are single crystalline in the monoclinic structure, consistent with the Raman results. The room temperature stability of the CrCl3 flakes decreases with decreasing thickness. The tunneling magnetoresistance of graphite/CrCl3/graphite tunnel junctions confirms that few-layer CrCl3 possesses in-plane magnetic anisotropy and Néel temperature of 17 K. Our study paves the path for developing CrCl3-based scalable 2D spintronic applications.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Van der Waals magnets, CrX3, spintronics

Date published: 2022-12-01

Publisher: Wiley

Journal:

• Advanced Science (ISSN: 21983844) vol. 10 issue. 3 2203548

Funding:

• National Science Foundation DMR‐2118828
• National Science Foundation DMR‐1710461
• National Science Foundation OIA‐2044049
• National Science Foundation ECCS‐2025298

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1002/advs.202203548

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Updated at: 2025-02-14 12:31:56 +0900

Published on MDR: 2025-02-14 12:31:56 +0900