A chiral bobber is a localized three-dimensional magnetization configuration, terminated by a singularity. Chiral bobbers coexist with magnetic skyrmions in chiral magnets, lending themselves to new types of skyrmion-complementary bits of information. However, the on-demand creation of bobbers, as well as their direct observation remained elusive. Here, we introduce a new mechanism for creating a stable chiral bobber lattice state via the proximity of two skyrmion species with comparable size. This effect is experimentally demonstrated in a Cu2OSeO3/[Ta/CoFeB/MgO]4 heterostructure in which an exotic bobber lattice state emerges in the phase diagram of Cu2OSeO3. To unambiguously reveal the existence of the chiral bobber lattice state, we have developed a novel characterization technique, magnetic truncation rod analysis, which is based on resonant elastic x-ray scattering.
@article{arxiv.2012.10924,
title = {Creation of a Chiral Bobber Lattice in Helimagnet-Multilayer Heterostructures},
author = {Kejing Ran and Yizhou Liu and Yao Guang and David M. Burn and Gerrit van der Laan and Thorsten Hesjedal and Haifeng Du and Guoqiang Yu and Shilei Zhang},
journal= {arXiv preprint arXiv:2012.10924},
year = {2021}
}