Magnetic Skyrmions Above Room Temperature in A Van Der Waals Ferromagnet Fe3GaTe2

Abstract Two‐dimensional (2D) van der Waals (vdW) ferromagnetic crystals are a promising platform for innovative spintronic devices based on magnetic skyrmions, thanks to their high flexibility and atomic thickness stability. However, room‐temperature skyrmion‐hosting vdW materials are scarce, which poses a challenge for practical applications. In this study, we employed a chemical vapor transport (CVT) approach to synthesize Fe 3 GaTe 2 crystals and observed room‐temperature Néel skyrmions in Fe 3 GaTe 2 nanoflakes above 58 nm in thickness through in‐situ Lorentz transmission electron microscopy (L‐TEM). Upon an optimized field cooling procedure, zero‐field hexagonal skyrmion lattices were successfully generated in nanoflakes with an extended thickness range (30‐180 nm). Significantly, these skyrmion lattices remain stable up to 355 K, setting a new record for the highest temperature at which skyrmions can be hosted. Our research established Fe 3 GaTe 2 as an emerging above‐room‐temperature skyrmion‐hosting vdW material, holding great promise for future spintronics. This article is protected by copyright. All rights reserved