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Spin-enhanced magnetocaloric effect in molecular nanomagnets

Marco Evangelisti·Andrea Candini·Alberto Ghirri·Marco Affronte·Euan K. Brechin·Eric J. L. McInnes
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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.

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Marco Evangelisti, Andrea Candini, Alberto Ghirri, Marco Affronte, Euan K. Brechin, Eric J. L. McInnes. 2005-07-18. Spin-enhanced magnetocaloric effect in molecular nanomagnets. https://doi.org/10.1063/1.2010604

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