Abstract
Monolayer (X=Te,Se,S) was theoretically proposed to be a two-dimensional intrinsic ferromagnetic semiconductor, although its physical properties have not been thoroughly investigated in bulk single crystals. We report the single-crystal growth, structural, magnetic, and electronic transport properties of () and . For , the strong perpendicular magnetic anisotropy of can be gradually tuned to be a nearly isotropic one by Se doping. Meanwhile, a systematic change in the conductivity with increasing is observed, displaying a doping-induced metal-insulator-like transition. Under magnetic field larger than 30 kOe, both and can be polarized to a ferromagnetic state. However, for , robust antiferromagnetism is observed up to 70 kOe, and two field-induced metamagnetic transitions are identified along . These intriguing properties together with the potential to be exfoliated down to few-layer thickness make (X=Te,Se,S) promising for exploring spintronic applications.
- Received 16 April 2022
- Revised 12 September 2022
- Accepted 23 September 2022
DOI:https://doi.org/10.1103/PhysRevMaterials.6.094013
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