Imprinting of skyrmions and bimerons in an antiferromagnet
Phys. Rev. B 111, 224429 – Published 26 June, 2025
DOI: https://doi.org/10.1103/753s-8nx4
Abstract
Topologically protected magnetic states in condensed matter physics, particularly antiferromagnetic (AFM) skyrmions (Sks) and bimerons (Bms), offer promising prospects for terahertz dynamics and sustained current-induced motion, thanks to their compensating multiple sublattice structure. However, nucleating AFM Sks and Bms is challenging due to the lack of net magnetization. Previous attempts to imprint predefined Sks and Bms in a ferromagnet and transfer them to an antiferromagnet using interfacial exchange bias in ferromagnetic (FM)/AFM heterostructures have been hindered by complex multilayers with discontinuities, polycrystallinity, or multipartite chiral antiferromagnets. Employing atomistic spin simulations, we demonstrate the viability of texture imprinting for nucleating Sks and Bms in antiferromagnets, using a prototypical bipartite AFM layer in a multilayer structure free from discontinuities. Such imprinting is a crucial step towards understanding the static and dynamic properties of natural AFM textures and their unique properties.