Dzyaloshinskii–Moriya Interaction in Fe₅GeTe₂ Epitaxial Thin Films

van der Waals ferromagnets, such as Fe₅GeTe₂, 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 Fe₅GeTe₂ thin films using Brillouin light scattering spectroscopy and observe a consistent DMI (<i>D</i> = 0.04 mJ/m²) 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 <i>ab initio</i> 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 Fe₅GeTe₂ a strong candidate for exploring the dynamics of chiral magnetic textures in two-dimensional materials.