Fragmenting Gadolinium: Mononuclear Polyoxometalate-Based Magnetic Coolers for Ultra-Low Temperatures

被引：76

作者：

Martinez-Perez, Maria-Jose ^{[1
,2
]}

Montero, Oscar ^{[1
,2
]}

Evangelisti, Marco ^{[1
,2
]}

Luis, Fernando ^{[1
,2
]}

Sese, Javier ^{[3
,4
]}

Cardona-Serra, Salvador ^{[5
]}

Coronado, Eugenio ^{[5
]}

机构：

[1] Univ Zaragoza, CSIC, ICMA, E-50009 Zaragoza, Spain

[2] Univ Zaragoza, CSIC, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[3] Univ Zaragoza, Dept Fis Mat Condensada, Zaragoza 50018, Spain

[4] Univ Zaragoza, Inst Nanociencia Aragon, Zaragoza 50018, Spain

[5] Univ Valencia, Inst Ciencia Mol ICMol, Paterna 46980, Spain

来源：

ADVANCED MATERIALS | 2012年 / 24卷 / 31期

关键词：

polyoxometalates; molecular nanomagnets; gadolinium; magnetic refrigeration; magnetocaloric effect; ultra-low temperatures; LANTHANIDE; DEMAGNETIZATION; ABSOLUTE;

D O I：

10.1002/adma.201200750

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The polyoxometalate clusters with formula [Gd(W5O18)(2)](9-) and [Gd(P5W30O110)](12-) each carry a single magnetic ion of gadolinium, which is the most widespread element among magnetic refrigerant materials. In an adiabatic demagnetization, the lowest attainable temperature is limited by the presence of magnetic interactions that bring about magnetic order below a critical temperature. We demonstrate that this limitation can be overcome by chemically engineering the molecules in such a way to effectively screen all magnetic interactions, suggesting their use as ultra-low-temperature coolers.

引用

页码：4301 / +

页数：6

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