PHYSICAL REVIEW B 97, 134403 (2018) Direct observation of attractive skyrmions and skyrmion clusters in the cubic helimagnet Cu2OSeO3

Direct observation of attractive skyrmions and skyrmion clusters in the cubic helimagnet Cu2OSeO3 J. C. Loudon,1,* A. O. Leonov,2,3,4,† A. N. Bogdanov,3,4 M. Ciomaga Hatnean,5 and G. Balakrishnan5 1Department of Materials Science and Metallurgy, 27 Charles Babbage Road, Cambridge, CB3 0FS, United Kingdom 2Department of Chemistry, Faculty of Science, Hiroshima University Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan 3Chiral Research Center, Hiroshima University, Higashi-Hiroshima, 739-8526, Japan 4IFW Dresden, Postfach 270016, D-01171 Dresden, Germany 5Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom