Theoretical modeling of the formation of Skyrmions in Fe-Gd

Skyrmions are one of the most complex magnetic orders observed and consist of a localized excitation

constructed from a vortex-like, continuous rotation of magnetic spins, representing a topological quasi-

particle. Also, skyrmions are interesting candidates for future information technologies due to their

topological protection, mobility, size, and low energy consumption compared to domain walls or other

conventional technologies. Recently, using a soft X-ray pulse, we have shown the formation of the

skyrmions in the Fe-Gd lattice and provided insight into skyrmion-skyrmion interactions. Using Density

Functional Theory (DFT), we have focused on forming skyrmions in the Fe-Gd lattice. First, we studied

the seven-crystal symmetry of the FeGd system and found the magnetic ground state structure of the Fe-

Gd systems. Next, we calculated the contribution of DMI using DFT calculation and an accurate low-

energy model for spin-dynamic simulations. We found that the in-plane magnetic configuration shows a

significant amount of DM interaction, which could be a signature of Skyrmion formation.