Ferromagnetism induced by in-plane strain in a bulk VS2-based superlattice: (LiOH)0.1VS2

Abstract

Transition metal dichalcogenides (TMDs) have attracted intensive research interest due to their diverse properties. However, ferromagnetism is not observed in layered TMDs, except for monolayer VSe₂. In this study, we report the synthesis of a bulk ferromagnetic material (LiOH)_0.1VS₂ based on topochemical reactions. The results demonstrate that the (LiOH)_0.1VS₂ crystal exhibits strong anisotropic ferromagnetism below a critical temperature of 40 K. Calculations uncover that the in-plane strains in a VS₂ superlattice can induce large magnetic anisotropic energy, which stabilizes the long-range ferromagnetic order. The findings provide a new approach to induce ferromagnetism in bulk TMD materials.