Wederni Asma, Ipatov Mihail, González Julián-María, Khitouni Mohamed, Suñol Joan-Josep
Department of Physics, P2, EPS, University of Girona, 17003 Girona, Spain.
Department of Applied Physics, University of the Basque Country, 20018 Donostia, Spain.
Materials (Basel). 2021 Nov 13;14(22):6851. doi: 10.3390/ma14226851.
Heusler Ni-Mn-Sn-based alloys are good candidates for magnetic refrigeration. This application is based on cycling processes. In this work, thermal cycles (100) have been performed in three ribbons produced by melt-spinning to check the thermal stability and the magnetic response. After cycling, the temperatures were slowly shifted and the thermodynamic properties were reduced, the entropy changed at about 3-5%. Likewise, the thermomagnetic response remains similar. Thus, these candidates maintain enough thermal stability and magnetic response after cycling. Likewise, Cu addition shifts the structural transformation to higher temperatures, whereas the Curie temperature is always near 310 K. Regarding magnetic shape memory applications, the best candidate is the NiMn SnCu alloy.
赫斯勒镍锰锡基合金是磁制冷的良好候选材料。这种应用基于循环过程。在这项工作中，对通过熔体纺丝制备的三条薄带进行了100次热循环，以检查其热稳定性和磁响应。循环后，温度缓慢变化，热力学性能降低，熵变化约3-5%。同样，热磁响应保持相似。因此，这些候选材料在循环后保持了足够的热稳定性和磁响应。同样，添加铜会使结构转变温度升高，而居里温度始终接近310K。关于磁形状记忆应用，最佳候选材料是NiMnSnCu合金。
