Gate-controlled magnetic phase transition in a van der Waals magnet Fe${}_5$GeTe${}_2$

Abstract

Magnetic van der Waals (vdW) materials, including ferromagnets (FM) and antiferromagnets (AFM), have given access to the investigation of magnetism in two-dimensional (2D) limit and attracted broad interests recently. However, most of them are semiconducting or insulating and the vdW itinerant magnets, especially vdW itinerant AFM, are very rare. Here, we studied the anomalous Hall effect of a vdW itinerant magnet Fe${}_5$GeTe${}_2$ (F5GT) with various thicknesses down to 6.8 nm (two unit cells). Despite the robust ferromagnetic ground state in thin-layer F5GT, however, we show that the electron doping implemented by a protonic gate can eventually induce a magnetic phase transition from FM to AFM. Realization of an antiferromagnetic phase in F5GT highlights its promising applications in high-temperature antiferromagnetic vdW devices and heterostructures.

arXiv comment27 pages

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Cited by in corpus (19)

• Electrical control of magnetism by electric field and current-induced torques
• Large-scale epitaxy of two-dimensional van der Waals room-temperature ferromagnet Fe5GeTe2
• Gate-tunable exchange bias effect in FePS3-Fe5GeTe2 van der Waals heterostructures
• Room temperature magnetic phase transition in an electrically-tuned van der Waals ferromagnet
• Anomalous resistivity upturn in the van der Waals ferromagnet Fe${}_5$GeTe${}_2$
• Unusual magnetotransport and anomalous Hall effect in quasi-two-dimensional van der Waals ferromagnet Fe${}_4$GeTe${}_2$
• Large-area synthesis of ferromagnetic Fe${}_{5-x}$GeTe${}_2$/graphene van der Waals heterostructures with Curie temperature above room temperature
• Tuning the Room Temperature Ferromagnetism in Fe5GeTe2 by Arsenic Substitution
• (Fe${}_{1-x}$Ni${}_x$)${}_5$GeTe${}_2$: an antiferromagnetic triangular Ising lattice with itinerant magnetism
• Thermal cycling induced alteration of the stacking order and spin-flip in the room temperature van der Waals magnet Fe${}_5$GeTe${}_2$
• Gate-controlled proximity effect in superconductor/ferromagnet van der Waals heterostructures
• Writing and detecting topological charges in exfoliated Fe${}_{5-x}$GeTe${}_2$
• Strain-induced interlayer magnetic coupling spike of two-dimensional van der Waals material Fe${}_5$GeTe${}_2$
• Flat bands and magnetism in $\mathbf{F}{\mathbf{e}}_4\mathbf{GeT}{\mathbf{e}}_2$ and $\mathbf{F}{\mathbf{e}}_5\mathbf{GeT}{\mathbf{e}}_2$ due to bipartite crystal lattices
• Tuning magnetic anisotropy in Fe${}_5$GeTe${}_2$ monolayer through doping and strain
• Gate-tunable nonlocal Josephson effect through magnetic van der Waals bilayers
• Nearly-room-temperature ferromagnetism and tunable anomalous Hall effect in atomically thin Fe4CoGeTe2
• Dimension-Dependent Critical Scaling Analysis and Emergent Competing Interaction Scales in a 2D Van der Waals magnet Cr${}_2$Ge${}_2$Te${}_6$
• Quantum Imaging of Ferromagnetic van der Waals Magnetic Domain Structures at Ambient Conditions