Direct Observation of Attractive Skyrmions and Skyrmion Clusters in the Cubic Helimagnet Cu${}_2$OSeO${}_3$

J. C. Loudon, A. O. Leonov, A. N. Bogdanov +2

We report the discovery of attractive magnetic skyrmions and their clusters in non-centrosymmetric ferromagnets. These three-dimensional solitons have been predicted to exist in th…