Direct Observation of Propagating Spin Waves in the 2D van der Waals Ferromagnet Fe₅GeTe₂.

ABSTRACT: Magnetism in reduced dimensionalities is of great fundamental interest while also providing perspectives for applications of materials with novel functionalities. In particular, spin dynamics in two dimensions (2D) have become a focus of recent research. Here, we report the observation of coherent propagating spin-wave dynamics in a ∼30 nm thick flake of 2D van der Waals ferromagnet Fe₅GeTe₂ using X-ray microscopy. Both phase and amplitude information were obtained by direct imaging below T_C for frequencies from 2.77 to 3.84 GHz, and the corresponding spin-wave wavelengths were measured to be between 1.5 and 0.5 μm. Thus, parts of the magnonic dispersion relation were determined despite a relatively high magnetic damping of the material. Numerically

SUBMITTER: Schulz F 

PROVIDER: S-EPMC10683057 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature