Magnetic domain walls of the van der Waals material Fe${}_3$GeTe${}_2$

Abstract

Among two-dimensional materials, Fe${}_3$GeTe${}_2$ has come to occupy a very important place owing to its ferromagnetic nature with one of the highest Curie temperatures among known van der Waals materials and the potential for hosting skyrmions. In this combined experimental and theoretical work, we investigate the magnetic bubble domains as well as the microscopic domain wall profile using spin-polarized scanning tunneling microscopy in combination with atomistic spin-dynamics simulations performed with parameters from density functional theory calculations. We find a weak magneto-electric effect influencing the domain wall width by the electric field in the tunneling junction and determine the critical magnetic field for the collapse of the bubble domains. Our findings shed light on the origins of complex magnetism that Fe${}_3$GeTe${}_2$ exhibits.

References in corpus (3)

• Surface Magnetoelectric Effect in Ferromagnetic Metal Films
• Spirit: Multifunctional Framework for Atomistic Spin Simulations
• Non-reciprocal magnons in a two dimensional crystal with off-plane magnetization

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• Scanning Tunneling Microscopy Study of Epitaxial Fe3GeTe2 Monolayers on Bi2Te3
• Signatures of Kondo-lattice behavior in the two-dimensional ferromagnet Fe${}_3$GeTe${}_2$