Tunable magnetocaloric properties of Gd based alloys via Zn and Cd additions

Tunable magnetocaloric properties of Gd based alloys via Zn and Cd additions
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通过添加 Zn 和 Cd 可调节 Gd 基合金的磁热性能

DOI:
10.1016/j.matdes.2017.08.064
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发表时间:
2017-11
影响因子:
8.4
通讯作者:
Hui Xu
Hui Xu
中科院分区:
材料科学1区
文献类型:
--
作者:
Xiaochen Wang;Bing Jiang;Jianxin Wang;Qianqian Lu;Xueling Hou;Hui Xu

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采用直接测量绝热温度变化(ΔTad)和低磁场变化(ΔH)的方法,研究了Zn和Cd单独或同时替代Gd的Gd基合金的磁热效应。对三种不同的合金Gd 1 −xZnx、Gd 1 − yCdy和Gd 0.95(Zn1 −zCdz)0.05在室温附近的绝热温度变化(ΔTad)和磁熵变(ΔSM)进行了比较研究。研究了Zn和Cd含量对不同合金的磁热效应和居里温度的影响。讨论了Gd 1 −xZnx、Gd 1 −yCdy和Gd 0.95(Zn1 −zCdz)0.05三种不同类型合金的相结构与ΔTad、ΔSM、Tc之间的直接关系。揭示了Zn提高Δ Tad和Cd提高Tcis的机理。室温附近的磁制冷有望取代传统的气体制冷。
Magnetocaloric effect by employing direct measurements of the adiabatic temperature changes (ΔTad) with a low magnetic field change (ΔH) up to 1.2 T are investigated, for the Gd based alloys with Zn and Cd substituted for Gd individually or synchronously. A comparative study of the adiabatic temperature change (ΔTad) and magnetic entropy change (ΔSM) near room temperature has been reported in three different alloys of Gd1 −xZnx, Gd1 −yCdyand Gd0.95(Zn1 −zCdz)0.05. Effects of Zn and Cd content on magnetocaloric effect and the Curie temperature (Tc) are studied in different alloys. A direct correlation between phase structure and ΔTad, ΔSM,Tcwas discussed in three different types alloys of Gd1 −xZnx, Gd1 −yCdy, and Gd0.95(Zn1 −zCdz)0.05. Mechanism of Zn improving the ΔTadand Cd increasing theTcis revealed. It is expected that magnetic refrigeration near room temperature has a potential for superseding the traditional gas refrigeration.
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