Engineering molecular rings for magnetocaloric effect

被引：77

作者：

Affronte, M

Ghirri, A

Carretta, S

Amoretti, G

Piligkos, S

Timco, GA

Winpenny, REP

机构：

[1] Univ Modena & Reggio Emilia, INFM, Natl Res Ctr Nanostruct & Biosyst Surfaces S3, I-41100 Modena, Italy

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

[3] Univ Parma, INFM, I-43100 Parma, Italy

[4] Univ Parma, Dipartimento Fis, I-43100 Parma, Italy

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

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 18期

关键词：

D O I：

10.1063/1.1737468

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

By substituting one Cr3+(s=3/2) with Cd2+(s=0) in molecular octanuclear rings, a diluted ensemble of identical nanomagnets with a S=3/2 ground state, weakly split in zero field, is obtained. The lattice contribution and the essential parameters of the spin Hamiltonian of these uncompensated antiferromagnetic cyclic spin systems are determined by fitting specific heat data between 0.4 and 20 K in magnetic fields up to 7 T. Different entropy contributions are evaluated and results suggest a possible way of engineering molecular magnets to exploit low temperature magnetocaloric effect. (C) 2004 American Institute of Physics.

引用

页码：3468 / 3470

页数：3

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