Expanding the magnetocaloric operation range in Ni–Mn–In Heusler alloys by Cu-doping
Expanding the magnetocaloric operation range in Ni–Mn–In Heusler alloys by Cu-doping
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DOI：
10.1088/0022-3727/49/12/125006
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发表时间：
2016-02
期刊：
影响因子：
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通讯作者：
J. Camarillo;E. Stern-Taulats;L. Mañosa;H. Flores-Zúñiga;D. Ríos-Jara;A. Planes
中科院分区：
文献类型：
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作者：
J. Camarillo;E. Stern-Taulats;L. Mañosa;H. Flores-Zúñiga;D. Ríos-Jara;A. Planes
我们研究了一组铜掺杂的 Ni-Mn-In 变磁形状记忆合金的磁热特性，目的是设计由选定的铜组分组成的具有大操作范围的复合材料。所研究的铜掺杂合金的特点是低磁滞 (∼5 K) 和其转变温度对所施加的磁场具有很强的敏感性，这确保了循环应用 6 T 时磁热熵变化 (ΔS∼21 ?> J K−1 kg−1) 的良好再现性。在所研究的成分区域内，铜分数的微调能够改变磁热熵变化 (ΔS∼21 ?> J K−1 kg−1)。 转变温度所需的量。通过在施加磁场下的量热测量，我们表明，通过组装定制成分的样品，可以构建在~30 K的宽温度范围内显示可逆大磁热效应（~7.5 J kg−1 K−1）的复合材料。
We study the magnetocaloric properties of a set of Cu-doped Ni–Mn–In metamagnetic shape memory alloys with the aim of designing composites with large operation range constituted of components of selected Cu-fractions. The studied Cu-doped alloys are characterized by a low hysteresis (∼5 K) and by a strong sensitivity of their transition temperatures to an applied magnetic field which ensures excellent reproducibility of the magnetocaloric entropy change (ΔS∼21 ?> J K−1 kg−1) upon cyclic application of 6 T. Within the studied composition region, fine-tuning of the Cu-fraction enables shifting the transition temperature by desired amounts. By means of calorimetric measurements under applied magnetic field we show that by assembling samples of tailored compositions it is possible to build a composite showing reversible large magnetocaloric effect (∼7.5 J kg−1 K−1) over a broad temperature range of ∼30 K.