Large magnetic entropy change and refrigeration capacity around room temperature in quinary Ni41Co9-xFexMn40Sn10 alloys (x=2.0 and 2.5)
Large magnetic entropy change and refrigeration capacity around room temperature in quinary Ni41Co9-xFexMn40Sn10 alloys (x=2.0 and 2.5)
复制标题
五元 Ni41Co9-xFexMn40Sn10 合金（x=2.0 和 2.5）在室温下具有大的磁熵变和制冷能力
DOI：
10.1016/j.jallcom.2020.154053
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发表时间：
2020
影响因子：
6.2
通讯作者：
Li L.
中科院分区：
文献类型：
--
作者：
Chen F.;Sanchez Llamazares J. L.;Sanchez-Valdes C. F.;Chen Fenghua;Li Zongbin;Tong Y. X.;Li L.
本文报道了用间接法和直接法测定的两种含Fe五元块体多晶合金Ni_（41）Co_（72）Fe_（22）Mn_（40）Sn_（10）和Ni_（41）Co_（6.5）Fe_（2.5）Mn_（40）Sn_（10）的磁热性能。两种样品均在室温附近具有较大的制冷量RC和最大磁熵变Δ SM。对于2 T（5 T）的磁场变化，18.9（22.4）J kg− 1 K − 1和11.8 Ni 41 Co 7 Fe 2 Mn 40 Sn 10和Ni41Co6.5Fe2.5Mn40Sn10合金的制冷量分别为128（396）J kg− 1和99（313）J kg− 1，合金Ni_（41）Co_（7）Fe_（22）Mn_（40）Sn_（10）的RC是迄今为止报道的Ni-Mn基Heusler合金的最大值之一。在1.5 T磁场变化下，直接测量表明这两种合金的最大绝热温度变化Δ Tadmax分别为-0.8 K和-1.5 K。本研究结果指出了铁合金化的Ni 41 Co 9 Mn 40 Sn 10 Heusler合金作为室温磁制冷剂的潜力。
We report the magnetocaloric properties of two Fe-containing quinary bulk polycrystalline alloys of nominal compositions Ni41Co7Fe2Mn40Sn10and Ni41Co6.5Fe2.5Mn40Sn10that were determined by indirect and direct methods. Both samples showed a large refrigeration capacityRCand maximum magnetic entropy change ΔSMpeakaround room temperature. For a magnetic field change of 2 T (5 T), a large magnetic entropy change of 18.9 (22.4) J kg−1K−1and 11.8 (16.8) J kg−1K−1and a refrigeration capacity of 128 (396) J kg−1and 99 (313) J kg−1were found in Ni41Co7Fe2Mn40Sn10and Ni41Co6.5Fe2.5Mn40Sn10alloys, respectively.RCfor the alloy Ni41Co7Fe2Mn40Sn10, is among the largest value reported so far for Ni–Mn based Heusler alloys. Under a 1.5 T field change, the direct measurements showed the maximum adiabatic temperature changes ΔTadmaxof −0.8 K and −1.5 K for these two alloys, respectively. The present findings point out the potential of Fe-alloyed Ni41Co9Mn40Sn10Heusler alloys as room-temperature magnetic refrigerants.