Spin-enhanced magnetocaloric effect in molecular nanomagnets
arXiv:cond-mat/0507407 · doi:10.1063/1.2010604
Abstract
An unusually large magnetocaloric effect for the temperature region below 10 K is found for the Fe14 molecular nanomagnet. This is to large extent caused by its extremely large spin S ground-state combined with an excess of entropy arising from the presence of low-lying excited S states. We also show that the highly symmetric Fe14 cluster core, resulting in small cluster magnetic anisotropy, enables the occurrence of long-range antiferromagnetic order below T_N=1.87 K.
4 pages, 3 figures, accepted for publication in Applied Physics Letters