Large-scale epitaxy of two-dimensional van der Waals room-temperature ferromagnet Fe5GeTe2

Abstract

In recent years, two-dimensional van der Waals materials have emerged as an important platform for the observation of long-range ferromagnetic order in atomically thin layers. Although heterostructures of such materials can be conceived to harness and couple a wide range of magneto-optical and magneto-electrical properties, technologically relevant applications require Curie temperatures at or above room-temperature and the ability to grow films over large areas. Here we demonstrate the large-area growth of single-crystal ultrathin films of stoichiometric Fe5GeTe2 on an insulating substrate using molecular beam epitaxy. Magnetic measurements show the persistence of soft ferromagnetism up to room temperature, with a Curie temperature of 293 K, and a weak out-of-plane magnetocrystalline anisotropy. Surface, chemical, and structural characterizations confirm the layer-by-layer growth, 5:1:2 Fe:Ge:Te stoichiometric elementary composition, and single crystalline character of the films.

References in corpus (3)

• Tuning Magnetic Order in the van der Waals Metal Fe5GeTe2 by Cobalt Substitution
• Itinerant ferromagnetism mediated by giant spin polarization of metallic ligand band in van der Waals magnet Fe5GeTe2
• Van der Waals Magnet based Spin-Valve Devices at Room Temperature

Cited by in corpus (19)

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• Magnetic Anisotropy in Two-dimensional van der Waals Magnetic Materials and Their Heterostructures: Importance, Mechanisms, and Opportunities
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• Reversible Non-Volatile Electronic Switching in a Near Room Temperature van der Waals Ferromagnet
• Large-area synthesis of ferromagnetic Fe${}_{5-x}$GeTe${}_2$/graphene van der Waals heterostructures with Curie temperature above room temperature
• Self-intercalation as origin of high-temperature ferromagnetism in epitaxially grown Fe5GeTe2 thin films
• Thermal cycling induced alteration of the stacking order and spin-flip in the room temperature van der Waals magnet Fe${}_5$GeTe${}_2$
• Roadmap on Quantum Magnetic Materials
• Tuning the Curie temperature of a 2D magnet/topological insulator heterostructure to above room temperature by epitaxial growth
• Microscopic origin of the magnetic easy-axis switching in Fe3GaTe2 under pressure
• Above-room-temperature ferromagnetism in large-area epitaxial Fe3GaTe2/graphene van der Waals heterostructures
• Strain-induced interlayer magnetic coupling spike of two-dimensional van der Waals material Fe${}_5$GeTe${}_2$
• Writing and detecting topological charges in exfoliated Fe${}_{5-x}$GeTe${}_2$
• Dzyaloshinskii-Moriya interaction in Fe5GeTe2 epitaxial thin films
• Dichotomy of flat bands in the van der Waals ferromagnet Fe${}_5$GeTe${}_2$
• Giant Exfoliation Induced Magnetic Coercivity in Fe${}_3$GaTe${}_2$
• Spin scattering and Hall effects in monolayer Fe3GeTe2