Large Magnetocaloric Effect and Magnetic Properties in ErCoAl
Large Magnetocaloric Effect and Magnetic Properties in ErCoAl
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DOI：
10.1016/j.phpro.2015.12.145
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Dexin Li;Y. Homma;F. Honda;T. Yamamura;D. Aoki
中科院分区：
文献类型：
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作者：
Dexin Li;Y. Homma;F. Honda;T. Yamamura;D. Aoki
研究了六方MgZn_2型金属间化合物ErCoAl的磁性能和磁热效应。该化合物在居里温度TC =16 K时发生二级铁磁相变。在TC周围，当磁场变化为30、50和70 kOe时，最大熵变和相对冷却功率分别为11.0、15.5和18.5 Jkg− 1 K − 1和151、284和433 Jkg-1。这些实验结果表明，ErCoAl是一种工作在20 K附近的磁制冷材料。
Magnetic properties and magnetocaloric effects of the intermetallic compound ErCoAl, crystallizing in the hexagonal MgZn2-type structure, have been investigated. This compound shows second-order ferromagnetic transition with Curie temperatureTC=16 K. AroundTC, the maximum entropy change and relative cooling power are estimated to be 11.0, 15.5 and 18.5 Jkg−1K−1and 151, 284, and 433 Jkg-1for a field change of 30, 50, and 70 kOe, respectively. These experimental results suggest that ErCoAl could be an appropriate candidate for magnetic refrigerant working at the temperatures near 20 K.