Ground state of magnetic dots in a triangular lattice

Ground states and magnetization process for an triangular lattice array of magnetic dots with perpendicular anisotropy.
V. E. Kireev, R. S. Khymyn, B. A. Ivanov, and C. E. Zaspel
ArXiv 1201.1747 (2012)

Minimal configurations for rectangular samples of different shapes.