Spin configurations in a single Fe cube

Size-Specific Spin Configurations in Single Iron Nanomagnet: From Flower to Exotic Vortices.

Christophe Gatel, Francisco Javier Bonilla, Anca Meffre, Etienne Snoeck, Bénédicte Warot-Fonrose, Bruno Chaudret, Lise-Marie Lacroix, and Thomas Blon

Nano Letters 15, 6952 (2015)