Free-energy landscapes of granular clusters grown by magnetic interaction Jorge González-Gutiérrez, J. L. Carrillo-Estrada, O. Carvente and J. C. Ruiz-Suárez Eur. Phys. J. E, 37 5 (2014) 37 Published online: 21 May 2014 DOI: 10.1140/epje/i2014-14037-x