Molecular nanoclusters as magnetic refrigerants:: The case of Fe14 with very large spin ground-state

被引：25

作者：

Evangelisti, M

Candini, A

Ghirri, A

Affronte, M

Piligkos, S

Brechin, EK

McInnes, EJL

机构：

[1] Univ Modena & Reggio Emilia, INFM, Natl Res Ctr, I-41100 Modena, Italy

[2] Univ Modena & Reggio Emilia, Dipartimento Fis, I-41100 Modena, Italy

[3] Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England

来源：

POLYHEDRON | 2005年 / 24卷 / 16-17期

关键词：

molecular magnetic nanoclusters; magnetocaloric effect; magnetic order; specific beat;

D O I：

10.1016/j.poly.2005.03.123

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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. (c) 2005 Elsevier Ltd. All rights reserved.

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页码：2573 / 2578

页数：6

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