Magnetic Skyrmions

Spontaneous atomic-scale magnetic skyrmion lattice in two dimensions.
Stefan Heinze, Kirsten von Bergmann, Matthias Menzel, Jens Brede, André Kubetzka, RolandWiesendanger, Gustav Bihlmayer and Stefan Blügel
Nature Phys. 7, 713 (2011)

The nanoskyrmion lattice of the Fe ML on Ir(111).