Room-temperature skyrmion lattice in a layered magnet (Fe_0.5Co_0.5)₅GeTe₂.

ABSTRACT: Novel magnetic ground states have been stabilized in two-dimensional (2D) magnets such as skyrmions, with the potential next-generation information technology. Here, we report the experimental observation of a Néel-type skyrmion lattice at room temperature in a single-phase, layered 2D magnet, specifically a 50% Co-doped Fe₅GeTe₂ (FCGT) system. The thickness-dependent magnetic domain size follows Kittel's law. The static spin textures and spin dynamics in FCGT nanoflakes were studied by Lorentz electron microscopy, variable-temperature magnetic force microscopy, micromagnetic simulations, and magnetotransport measurements. Current-induced skyrmion lattice motion was observed at room temperature, with a threshold current density, j_th = 1 × 10⁶

SUBMITTER: Zhang H 

PROVIDER: S-EPMC8942374 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature