Large magnetocaloric effect in Er12Co7 compound and the enhancement of dTFWHM by Ho-substitution
Large magnetocaloric effect in Er12Co7 compound and the enhancement of dTFWHM by Ho-substitution
复制标题
Er12Co7 化合物中的大磁热效应以及 Ho 取代增强 dTFWHM
DOI：
10.1016/j.jallcom.2016.04.216
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发表时间：
2016
影响因子：
6.2
通讯作者：
B. G. Shen
中科院分区：
文献类型：
--
作者：
X. Q. Zheng;B. Zhang;Y. Q. Li;H. Wu;H. Zhang;J. Y. Zhang;S. G. Wang;Q. Z. Huang;B. G. Shen
合成了具有大磁热效应的单斜晶系Er 12 Co 7多晶化合物。磁场变化为0-2 T和0-5 T时，磁熵变（ΔSM）的最大值分别为10.2J/kgK和18.3J/kgK。为了进一步深入了解MCE，制造并研究了具有各种Ho替代Er的样品。结果表明，Ho取代对Er_（12）Co_（7）化合物的磁性能和MCE有很大的影响。通过成分优化，将Ho_（12）Co_（7）和Er_（60）Ho_（60）Co_（7）的混合物（质量比为58：42）调整为最佳的MCE性能。计算得到混合工质的ΔSM最大值为16.7J/kgK，ΔSM-T曲线半高宽为37.9K，制冷量为522 J/kg。
Polycrystalline monoclinic Er12Co7compound with a large magnetocaloric effect (MCE) was synthesized. The maximum values of the magnetic entropy change (ΔSM) under the field changes of 0–2 T and 0–5 T reach 10.2 J/kgK and 18.3 J/kgK, respectively. In order to gain further insight in understanding the MCE, samples with various Ho substitutions for Er were fabricated and studied. It was found that Ho-substitution makes a great impact on the magnetic properties and MCE of Er12Co7compound. Through compositional optimization, the mixed product of Ho12Co7and Er6Ho6Co7with the weight ratio of 58:42 was tailored to exhibit the best MCE performance. The maximum value of ΔSM, the full width at half maximum of ΔSM-T curve and the refrigerant capacity of the mixed compound are calculated to be 16.7 J/kgK, 37.9 K and 522 J/kg, respectively.