Giant magnetocaloric effect of MnAs1-xSbx

被引:1315
作者
Wada, H [1 ]
Tanabe, Y [1 ]
机构
[1] Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 6068501, Japan
关键词
D O I
10.1063/1.1419048
中图分类号
O59 [应用物理学];
学科分类号
摘要
A giant magnetocaloric effect was found in MnAs, which undergoes a first-order ferromagnetic to paramagnetic transition at 318 K. The magnetic entropy change caused by a magnetic field of 5 T is as large as 30 J/K kg at the maximum value, which exceeds that of conventional magnetic refrigerant materials by a factor of 2-4. The adiabatic temperature change reaches 13 K in a field change of 5 T. The substitution of 10% Sb for As reduces the thermal hysteresis and lowers the Curie temperature to 280 K, while the giant magnetocaloric properties are retained. (C) 2001 American Institute of Physics.
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页码:3302 / 3304
页数:3
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