Magnetic Skyrmions Above Room Temperature in A Van Der Waals Ferromagnet Fe 3 GaTe 2 .

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.