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Effect of pressure on the phase stability and magnetostructural transitions in nickel-rich NiFeGa ribbons

AuthorsManchón-Gordón, Alejandro F.; Ipus, Jhon J.; Kowalczyk. Magddalena; Wójcik, A.; Blázquez, Javier S.; Conde, Clara F.; Maziarz, W.; Svec, P.; Kulik, T.; Conde, A.
KeywordsMagnetic shape memory alloys
Martensite structure
4 M modulated phase
Magnetostructural transition
Issue Date2020
CitationJournal of Alloys and Compounds, 844: 156092 (2020)
AbstractRibbons 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.
Publisher version (URL)https://doi.org/10.1016/j.jallcom.2020.156092
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