Anisotropic exchange interactions in Co₃Sn₂S₂ Kagome lattice ferromagnets

The study explores the magnetic interactions of the Kagome lattice ferromagnet Co₃Sn₂S₂, which exhibits exotic topological states in condensed matter physics. The material hosts a giant anomalous Hall state and the antiferromagnetic state in the a-b plane competes with the ferromagnetic order. As the temperature approaches T_c, the antiferromagnetic state gains strength, leading to strange magnetization dynamics. The study reveals that anisotropic exchange interactions are the underlying mechanism, causing long-range magnetism to form and grow with increasing temperature.