Giant magnetocaloric effect in melt-spun Ni-Mn-Ga ribbons with magneto-multistructural transformation
Giant magnetocaloric effect in melt-spun Ni-Mn-Ga ribbons with magneto-multistructural transformation
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DOI：
10.1063/1.4863273
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发表时间：
2014-01-27
影响因子：
4
通讯作者：
Zuo, Liang
中科院分区：
文献类型：
--
作者：
Li, Zongbin;Zhang, Yudong;Zuo, Liang
基于磁热效应的磁制冷技术可以替代传统的气体压缩/膨胀制冷技术，具有节能、环保的优点。低成本、高性能的磁制冷剂是磁制冷应用的迫切需求。在这里，我们证明了巨大的MCE可以实现退火Ni 52 Mn 26 Ga 22带磁多结构转变。在磁场变化为5 T时，其最大磁熵变为-30.0 J kg（-1）K-1，几乎是初始快淬薄带的3倍，与多晶块体合金相当甚至上级. (C)2014 AIP Publishing LLC.
Magnetic refrigeration based on the magnetocaloric effect (MCE) may provide an energy-efficient and environment-friendly alternative to the conventional gas compression/expansion cooling technology. For potential applications, low-cost and high-performance magnetic refrigerants are in great need. Here, we demonstrate that giant MCE can be achieved in annealed Ni52Mn26Ga22 ribbons with magneto-multistructural transformation. It yields a maximum magnetic entropy change of -30.0 J kg(-1) K-1 at the magnetic field change of 5 T, being almost three times as that of initial melt-spun ribbons and comparable to or even superior to that of polycrystalline bulk alloys. (C) 2014 AIP Publishing LLC.