Giant low-field magnetocaloric effect in Si alloyed Ni-Co-Mn-In alloys
Giant low-field magnetocaloric effect in Si alloyed Ni-Co-Mn-In alloys
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Si 合金 Ni-Co-Mn-In 合金中的巨低场磁热效应
DOI：
10.1016/j.scriptamat.2018.09.029
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发表时间：
2019-01-15
影响因子：
6
通讯作者：
Zuo, Liang
中科院分区：
文献类型：
--
作者：
Li, Zongbin;Dong, Shuya;Zuo, Liang
对于NiMn基Heusler合金，同时实现高的磁化差和低的热滞后跨越磁结构转变是至关重要的，以获得大的低场致动磁热性能。在Ni-Co-Mn-In合金中引入第五元素Si代替In，以降低合金的热滞效应，同时通过马氏体相变保持较大的磁化强度变化。因此，在低场变化为2 T的情况下，在Ni 45 Co 5 Mn 37 In 12 Si 1合金中实现了33.6 J kg（-1）K-1的巨大最大熵变Δ S-M（max），这是NiMn基合金中报道的最高值之一。(C)2018 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
For NiMn-based Heusler alloys, simultaneously achieving high magnetization difference and low thermal hysteresis across the magnetostructural transformation is of crucial importance to obtain large low-field actuated magnetocaloric properties. Here, the fifth element Si was introduced to replace In for reducing the thermal hysteresis in Ni-Co-Mn-In alloys while keeping a large magnetization change through the martensitic transformation. Consequently, a giant maximum entropy change Delta S-M(max) of 33.6 J kg(-1) K-1 under the low field change of 2 T was achieved in a Ni45Co5Mn37In12Si1 alloy, which is among the highest values reported in NiMn-based alloys. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.