Tuning magnetic ground states of R Mn 6 Sn 6 ( R = Lu, Mg) kagome metals by dimensionality reduction: Route to ferromagnetism and large …

By employing computational methods, the authors have demonstrated that dimensionality reduction provides an effective strategy for engineering electronic and magnetic structures. Specifically, starting from the bulk Kagome parent compound RMn₆Sn₆ (R = Lu, Mg), this approach has led to the design of ferromagnetic thin films RMn₆Sn₈, where the RKKY interaction stabilizes robust ferromagnetism. These films exhibit Weyl states, nontrivial band crossings, large Berry curvature, and a pronounced anomalous Hall effect. As Kagome metallic Weyl ferromagnets, these 2D structures combine strong magnetism with nontrivial topology, offering pathways for spintronics, low-power memory, Hall sensors, and energy-efficient device engineering.