Spin-enhanced magnetocaloric effect in molecular nanomagnets

By M. Evangelisti, A. Candini, A. Ghirri, M. Affronte, E. Brechin, E. McInnes. 2005

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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 TN=1.87K.

Subfields: Electronic, Optical and Magnetic Materials, Inorganic Chemistry

View Paper: https://www.semanticscholar.org/paper/47e22fca5d24202c230ce0a5b2a6bde0721d97f6