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Molecular nanoclusters as magnetic refrigerants: The case of Fe14with very large spin ground-state

Authors
Journal
Polyhedron
0277-5387
Publisher
Elsevier
Publication Date
Volume
24
Identifiers
DOI: 10.1016/j.poly.2005.03.123
Keywords
  • Molecular Magnetic Nanoclusters
  • Magnetocaloric Effect
  • Magnetic Order
  • Specific Heat
Disciplines
  • Physics

Abstract

Graphical 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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