Comment on "Theoretical design of molecular nanomagnets for magnetic   refrigeration" [Appl. Phys. Lett. 103, 202410 (2013)]
  Garlatti et al. [Appl. Phys. Lett. 103, 202410 (2013)] report theoretical simulations aimed at showing that the best molecular nanomagnets for magnetic refrigeration between T = 10 K and sub-Kelvin region are those made of strongly ferromagnetically-coupled magnetic ions. This Comment revises such conclusion based on results that, apparently, contrast with the established belief in this research field. 
Marco Evangelisti, Giulia Lorusso and Elias Palacios
cond-mat.mes-hall cond-mat.mtrl-sci