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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Magnetocaloric effect and magnetic-field-induced shape recovery effect at room temperature in ferromagnetic Heusler alloy Ni-Mn-Sb
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Magnetocaloric effect and magnetic-field-induced shape recovery effect at room temperature in ferromagnetic Heusler alloy Ni-Mn-Sb

机译：铁磁Heusler合金Ni-Mn-Sb在室温下的磁热效应和磁场诱导的形状恢复效应

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摘要

The martensitic transition, magnetocaloric effect ( MCE) and shape memory effect ( MSE) of ferromagnetic Heusler alloys Ni50Mn50-x Sb-x (x = 12, 13 and 14) have been investigated. A large positive magnetic entropy change Delta SM was observed in the vicinity of the martensitic transition. The maximum value of Delta SM is 9.1 J kg(-1) K-1 in Ni50Mn37Sb13 at 287K for a magnetic field change of 5 T. This change originates from the first-order transition from a low-temperature weak-magnetic martensitic phase to a high-temperature ferromagnetic parent phase. A magnetic-field-induced shape recovery strain of about 15 ppm at room temperature and at a relatively low magnetic field ( 1.2 T) was observed to accompany the reverse martensitic transformation. The large field-induced MCE and MSE in the NiMnSb system make it a promising material for room-temperature application.
机译：研究了铁磁Heusler合金Ni50Mn50-x Sb-x（x = 12、13和14）的马氏体转变，磁热效应（MCE）和形状记忆效应（MSE）。在马氏体转变附近观察到大的正磁熵变ΔSM。对于5 T的磁场变化，在287K下Ni50Mn37Sb13中的Delta SM的最大值为9.1 J kg（-1）K-1。该变化源自低温弱磁马氏体相到高温的第一阶跃迁。高温铁磁母相。观察到在室温和相对较低的磁场（1.2 T）下，磁场诱导的形状恢复应变约为15 ppm，伴随着马氏体逆相变。 NiMnSb系统中的大场感应MCE和MSE使其成为室温应用的有前途的材料。

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