Local Inversion Symmetry Breaking and Thermodynamic Evidence for Ferrimagnetism in Fe3GaTe2

My Contribution

I investigated how local inversion symmetry breaking affects the formation and character of topological spin textures in Fe₃GaTe₂. Using micromagnetic simulations (MUMAX3), I systematically tuned material parameters to differentiate between Néel-type and Bloch-hybrid skyrmion types, providing the theoretical confirmation for the specific chiral textures observed in Lorentz TEM experiments.

My simulations demonstrated that Néel-type skyrmions are stabilized by a non-zero Dzyaloshinskii-Moriya interaction (DMI) originating from the vertical displacement of Fe2 atoms, even in the presence of global inversion symmetry. I also found that enhanced saturation magnetization shifts the system toward Bloch-dominated hybrid skyrmions, reconciling apparently conflicting experimental reports in the literature. These results provide a convincing explanation for the puzzle of Néel skyrmions in centrosymmetric systems.