Low-field inverse magnetocaloric effect in Ni50-xMn39+xSn11 Heusler alloys
Low-field inverse magnetocaloric effect in Ni50-xMn39+xSn11 Heusler alloys
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DOI：
10.1063/1.2435593
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发表时间：
2007-01-22
影响因子：
4
通讯作者：
Du, Y. W.
中科院分区：
文献类型：
--
作者：
Han, Z. D.;Wang, D. H.;Du, Y. W.
研究了Ni50-xMn39+xSn11合金（x=5、6和7）的低场磁熵变。随着Mn浓度的增加，马氏体转变温度降低。在 10 kOe 的外加磁场下，当 x=5、6 和 7 时，磁熵变分别为 6.8、10.1 和 10.4 J/kg K。 Ni50-xMn39+xSn11 中的大熵变可归因于与从铁磁母相到弱磁马氏体相的马氏体转变相关的急剧磁化强度变化。大的低场磁熵变和低成本表明Ni50-xMn39+xSn11合金是有前途的磁性制冷剂。 (c) 2007 年美国物理研究所。
The low-field magnetic entropy changes in Ni50-xMn39+xSn11 alloys (x=5, 6, and 7) were investigated. The martensitic transition shifts to lower temperature with the increase of Mn concentration. Under an applied magnetic field of 10 kOe, the magnetic entropy changes are 6.8, 10.1, and 10.4 J/kg K, for x=5, 6, and 7, respectively. The large entropy change in Ni50-xMn39+xSn11 can be attributed to the sharp magnetization change associated with the martensitic transition from a ferromagnetic parent phase to a weak-magnetic martensitic phase. The large low-field magnetic entropy change and low cost suggest Ni50-xMn39+xSn11 alloy as the promising magnetic refrigerant. (c) 2007 American Institute of Physics.