Enhancing magnetocrystalline anisotropy through interface coupling in a 2D ferromagnetic Fe3GeTe2/VI3 heterostructure.

Interface coupling is considered as an effective approach to manipulate the physical properties of heterostructures. Here, we fabricated the heterostructure composed of two-dimensional (2D) ferromagnetic Fe₃GeTe₂ (FGT) and VI₃. The experimental findings demonstrated that VI₃ plays a pivotal role in modulating the spin texture of FGT through close-range coupling, leading to a substantial increment in the coercive field (H_C) of FGT by ∼150%. To rational our findings, density functional theory calculations were employed to investigate the underlying mechanism. We propose that the spin pining effect at the interface contributes significantly to the observed enhancement of magnetic anisotropy. This research expands our understanding of interface effects and offers a promising method for the magnetism manipulation in 2D ferromagnetic systems. [ABSTRACT FROM AUTHOR]