Comment on "Theoretical design of molecular nanomagnets for magnetic refrigeration" (Appl. Phys. Lett. 103, 202410 (2013))

@article{Evangelisti2014CommentO,
  title={Comment on "Theoretical design of molecular nanomagnets for magnetic refrigeration" (Appl. Phys. Lett. 103, 202410 (2013))},
  author={Marco Evangelisti and Giulia Lorusso and El{\'i}as Palacios},
  journal={Applied Physics Letters},
  year={2014},
  volume={105},
  pages={046101}
}
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. 

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Magnetic entropy changes, normalized to the gas constant, for the three cases reported in Ref. 1. The applied field change is DB ¼ B hot À B cold