We report on the magnetic and thermal properties of the Fe-14 Molecular nanocluster. We find a huge magnetocaloric response in the temperature range below 10 K. This is to large extent caused by its very large spin ground-state combined with an excess of entropy arising from the admixture of low-lying excited S states. We also show that the high degree of symmetry of the Fe-14 cluster core, resulting in a very small cluster magnetic anisotropy, enables the Occurrence of long-range antiferromagnetic order below T-N = 1.87 K.
Molecular nanoclusters as magnetic refrigerants: The case of Fe-14 with very large spin ground-state / Evangelisti, M; Candini, A; Ghirri, A; Affronte, Marco; Piligkos, S; Brechin, Ek; Mcinnes, Ejl. - In: POLYHEDRON. - ISSN 0277-5387. - STAMPA. - 24:16-17(2005), pp. 2573-2578. [10.1016/j.poly.2005.03.123]
Molecular nanoclusters as magnetic refrigerants: The case of Fe-14 with very large spin ground-state
AFFRONTE, Marco;
2005
Abstract
We report on the magnetic and thermal properties of the Fe-14 Molecular nanocluster. We find a huge magnetocaloric response in the temperature range below 10 K. This is to large extent caused by its very large spin ground-state combined with an excess of entropy arising from the admixture of low-lying excited S states. We also show that the high degree of symmetry of the Fe-14 cluster core, resulting in a very small cluster magnetic anisotropy, enables the Occurrence of long-range antiferromagnetic order below T-N = 1.87 K.
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