Phase transitions and the magnetocaloric effect in Mn rich Ni–Mn–Ga Heusler alloys
Phase transitions and the magnetocaloric effect in Mn rich Ni–Mn–Ga Heusler alloys
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DOI：
10.1016/j.jmmm.2006.01.029
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发表时间：
2006-10
影响因子：
2.7
通讯作者：
Xuezhi Zhou;H. Kunkel;Gwyn P. Williams;Shuihe Zhang;Xue De-Sheng
中科院分区：
文献类型：
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作者：
Xuezhi Zhou;H. Kunkel;Gwyn P. Williams;Shuihe Zhang;Xue De-Sheng
在电弧熔炼制备的富Mn多晶Heusler合金Ni50Mn25+−xGa25−x中，结构/一阶磁转变温度随Mn含量的增加而降低。居里温度tsi高于同系列富Ni合金（Ni50+xMn25−xGa25），且受成分x的影响较小。|ΔSM|的磁熵变化也随着Mn含量的增加而增加，而ΔSMis的场依赖行为与单晶Ni52.6Mn23.1Ga24.3相似。
In Mn rich polycrystalline Heusler alloys, Ni50Mn25+−xGa25−x, prepared by Arc melting, it is found that the structural/first-order magnetic transition temperature Tmincreases as the Mn content increases. The Curie temperature Tcis higher than that of Ni rich alloys (Ni50+xMn25−xGa25) of the same series, and is less affected by composition x. Magnetic entropy change of |ΔSM| also increases as Mn content increases, while behaviour of the field dependence of ΔSMis similar to that of single crystal Ni52.6Mn23.1Ga24.3.