Chiral Spin Textures in Amorphous Rare-earth Transition-metal Ferrimagnets*

Chiral spin textures including magnetic skyrmions have drawn extensive interest for their potential in serving as the building blocks in future memory and logic devices. These chiral spin textures are stabilized through the Dzyaloshinskii-Moriya interactions (DMI). While skyrmions have been observed experimentally in amorphous rare-earth transition-metal ferrimagnets, challenges remain in identifying other possible chiral spin textures. In this work, we report calculated chiral spin textures beside skyrmions in 10 nm thick CoGd thin films. Using the atomistic Landau–Lifshitz–Gilbert (LLG) equation, we evolve various initial spin textures to uncover metastable spin configuration states in magnetic energy landscape. This study can help the design of next-generation spintronics using chiral spin textures.