Near room-temperature magnetocaloric effect in amorphous Fe-Sc alloys: the effect of minor Co additions
Near room-temperature magnetocaloric effect in amorphous Fe-Sc alloys: the effect of minor Co additions
复制标题
非晶 Fe-Sc 合金中的近室温磁热效应：少量 Co 添加的影响
DOI：
10.1016/j.jnoncrysol.2018.10.052
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发表时间：
2019
影响因子：
3.5
通讯作者：
Feng Tao
中科院分区：
文献类型：
--
作者：
Fang Yini;Yu Zhou;Peng Guo;Feng Tao
本文报道了Fe90-xCoxSc10（x = 1,3,5和7）非晶合金的制备和磁热效应研究。Co含量的增加不仅可以使合金的居里温度调整到室温，同时也增加了磁熵变化的最大值（−ΔSMpk）。1.40的−ΔSMpkis J /公斤 KΔH = 1.5 T(ΔH:磁场变化)和x = 7。在ΔH= 1.5 T, x = 3时，制冷剂的最大制冷量为191.9 J/kg，高于目前发现的大多数铁基非晶合金的制冷量。增加ΔHto 2 T，合金的therc值可高达265.2 J/kg，与Gd和Gd5Si2Ge2晶体中的therc值相当。在这些合金中观察到的增强的drc值使它们有望成为近室温磁性制冷剂的良好候选者。
The fabrication and magnetocaloric effect studies of Fe90-xCoxSc10(x = 1, 3, 5 and 7) amorphous alloys are reported herein. The addition of Co content can not only tune the Curie temperature of these alloys to room temperature, but also simultaneously increase the maximum value of the magnetic entropy change (−ΔSMpk). The −ΔSMpkis 1.40 J/kg K at ΔH= 1.5 T (ΔH: magnetic field change) with x = 7. The maximum refrigerant capacity (RC) is 191.9 J/kg at ΔH= 1.5 T with x = 3, which is higher than that of most of Fe-based amorphous alloys so far discovered. Increasing the ΔHto 2 T, theRCvalues of these alloys can reach as high as 265.2 J/kg, which is comparable to those detected in crystalline Gd and Gd5Si2Ge2. EnhancedRCvalues observed in these alloys promise them to be good candidates for near room-temperature magnetic refrigerants.