Magnetocaloric effects of Laves phase Er(Co1−xNix)2 compounds
Magnetocaloric effects of Laves phase Er(Co1−xNix)2 compounds
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DOI：
10.1016/s0925-8388(00)01305-0
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发表时间：
2001-03
影响因子：
6.2
通讯作者：
H. Wada;Y. Tanabe;M. Shiga;H. Sugawara;H. Sato
中科院分区：
文献类型：
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作者：
H. Wada;Y. Tanabe;M. Shiga;H. Sugawara;H. Sato
通过比热测量和磁化强度测量，研究了ErCo2单晶和Er(Co1−xNix)2多晶样品的磁热效应，其中x≤为0.10。由量热研究估算的磁热性质与ErCo2的磁化强度测量结果一致，ErCo2在32K经历一级磁相变。用10%Ni取代Co使居里温度从32K降低到13K。虽然一级相变在x=0.05时消失，但在x=0.10时保留了较大的MCE。结果表明，Er(Co1−xNix)2是一种很有潜力的活性磁再生材料。
The magnetocaloric effect (MCE) has been studied for ErCo2single crystals and Er(Co1−xNix)2polycrystalline samples with x≤0.10 by means of specific heat measurements and magnetization measurements. The magnetocaloric properties estimated from the calorimetric study are in agreement with those from the magnetization measurements for ErCo2which undergoes a first-order magnetic transition at 32 K. The substitution of 10% Ni for Co lowers the Curie temperature from 32 to 13 K. Although the first-order transition vanishes at around x=0.05, the large MCE is retained for x=0.10. The results suggest a high potential of Er(Co1−xNix)2as active magnetic regenerative materials.