Ambient pressure colossal magnetocaloric effect in Mn1-xCuxAs compounds

被引：47
作者：
Rocco, Daniel L.
de Campos, Ariana
Carvalho, Alexandre Magnus G.
Caron, Luana
Coelho, A. A.
Gama, S.
Gandra, Flavio C. G.
dos Santos, Adenilson O.
Cardoso, Lisandro P.
von Ranke, Pedro J.
de Oliveira, Nilson A.
机构：
[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil
[2] Univ Estado Rio De Janeiro, Inst Fis, BR-20550013 Rio De Janeiro, Brazil
来源：
APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 24期
基金：
巴西圣保罗研究基金会;
关键词：
Calorific value - Colossal magnetoresistance - Entropy - Pressure effects - Thermal effects;
D O I：
10.1063/1.2746074
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Magnetic refrigeration is a good alternative to gas compression technology due to higher efficiency and environmental concerns. Magnetocaloric materials must exhibit large adiabatic temperature variations and a large entropic effect. MnAs shows the colossal magnetocaloric effect under high pressures or with Fe doping. In this work the authors introduce a class of materials-Mn1-xCuxAs-revealing a peak colossal effect of -175 J/(K kg) for a 5 T field variation at 318 K and ambient pressure. (c) 2007 American Institute of Physics.
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页数：3
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