Abstract Ribbons of a Ni55Fe19Ga26 Heusler alloy were prepared by melt spinning technique. The effect of pressure on magnetostructural transitions was studied comparing as-spun ribbons to ribbons previously submitted to an axial pressure and to powder obtained from manually grinded as-spun ribbons. The martensitic transformation present in the as-spun ribbon almost vanishes after pulverization. The structural change driven by mechanical treatment is a stress-induced intermartensitic transformation from a 14 M modulated to a non-modulated tetragonal (NM) structure. There is a progressive change from the structure of as-spun samples to that of the pulverized one in samples submitted to axial pressures as it increases.

中文翻译：

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压力对富镍 NiFeGa 薄带相稳定性和磁结构转变的影响

摘要 采用熔纺技术制备了Ni55Fe19Ga26 Heusler合金带材。研究了压力对磁结构转变的影响，将初纺带与先前承受轴向压力的带以及从手动研磨的初纺带获得的粉末进行比较。初纺带中存在的马氏体转变在粉碎后几乎消失。机械处理驱动的结构变化是应力诱导的马氏体间转变，从 14 M 调制到非调制四方 (NM) 结构。在承受轴向压力的样品中，随着它的增加，从初纺样品的结构到粉碎样品的结构有逐渐变化。