Year: 2025
Type: article
Abstract: van der Waals ferromagnets, such as Fe 5 GeTe 2, offer a promising platform for spintronic devices based on chiral magnetic textures, provided a significant Dzyaloshinskii–Moriya interaction (DMI) can be induced to stabilize the textures. Here, we directly measure DMI in epitaxial Fe 5 GeTe 2 thin films using Brillouin light scattering spectroscopy and observe a consistent DMI ( D = 0.04 mJ/m 2 ) across various thicknesses. Its weak thickness dependence, combined with the nominally symmetric film interfaces, suggests a bulk origin. Although we do not determine the microscopic mechanism, our findings are compatible with ab initio calculations linking DMI to partial ordering of Fe split sites. Additionally, we find a low magnetic dissipation (α < 0.02). The observed DMI, which could be further enhanced by optimizing the Fe site ordering, combined with low dissipation, makes Fe 5 GeTe 2 a strong candidate for exploring the dynamics of chiral magnetic textures in two-dimensional materials.
Source: Nano Letters
Authors: João Sampaio, Antoine Pascaud, Edgar Quero, André Thiaville, Vincent Polewczyk, Alain Marty, Frédéric Bonell, Alexandra Mougin
Institutions: Centre National de la Recherche Scientifique, Université Paris-Saclay, Laboratoire de physique des Solides, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Grenoble, Institut de Recherche Interdisciplinaire de Grenoble, Spintronique et Technologie des Composants, Université Grenoble Alpes
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: Agence Nationale de la Recherche
Awards: Beyond CMOS with chiral textures, Two-dimensional magnetic materials, G2897843612, Advanced spintronic materials, MagNEtic eXchange with 2D maTerials, 2D magnetic memories: scalable growth and hybrid electrical operation, Electrical control of magnetization in fully epitaxial van der Waals heterostructures
OpenAlex ID: W4414358546