Layer-dependent spin-orbit torque switching of Néel vector in a van der Waals antiferromagnet Article Swipe
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· 2025
· Open Access
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· DOI: https://doi.org/10.1038/s41467-025-63966-2
· OA: W4414893069
Two-dimensional antiferromagnets that combine the dual advantages of van der Waals (vdW) and antiferromagnetic materials, provide an unprecedented platform to explore emergent spin-related phenomena. However, electrical manipulation of Néel vectors in vdW antiferromagnets -the cornerstone of antiferromagnetic spintronics- remains challenging. Here, we report layer-dependent electrical switching of the Néel vector in an A-type vdW antiferromagnet (Fe, Co)<sub>3</sub>GaTe<sub>2</sub> (FCGT) with perpendicular magnetic anisotropy. The Néel vector of FCGT with odd-number vdW layers can be 180° reversed via spin-orbit torques. Furthermore, we achieve field-free switching in an all-vdW, all-antiferromagnet heterostructure of FCGT/CrSBr in which the noncollinear interfacial spin texture breaks the mirror symmetry. Our results establish layer-controlled spin symmetries and interfacial spin engineering as universal paradigms for manipulating antiferromagnetic order, paving the way for realising reliable and efficient vdW antiferromagnetic devices.
