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• W4283516006 endingPage "169646" @default.
• W4283516006 startingPage "169646" @default.
• W4283516006 abstract "• Indirect determination of the magnetocaloric effect and phase transitions. • Arrott plot, magnetic entropy change, n exponent and universal curves analysis. • Novel approach of determination of the structural transition by using Arrott plots. • Magnetocaloric effect enhancement by phase transition temperature adjustment. • Phase transition diagram of Ni 2 FeGa microwires. Enhancement of magnetocaloric effect by proper tuning of phase transition temperatures was analysed on a series of Ni 2 FeGa Heusler glass-coated microwires. By a targeted combination of the structural and magnetic transition, the magnetic entropy change was enhanced more than three times from ≈ −0.25 J.kg −1 .K −1 at 125 K to ≈ −0.8 J.kg −1 .K −1 at the human body temperature 310 K, and cooling power increased significantly. In the presented investigation, different analytical approaches like the temperature-dependent magnetisation, magnetic entropy change, Arrott plots, universal curves analysis, n -exponent and Kouvel-Fisher method were performed to verify the presence and contribution of both types of transitions. The results show the possibility of establishing a phase diagram with the correlation between the structural and magnetic transition temperature as a function of the valence electrons concentration ratio (e/a) – chemical composition. Moreover, obtained results point to the fact that the transition temperatures are invariant under different analytical approaches. The phase diagram allows fine-tuning of the magnetocaloric effect in Ni 2 FeGa -based Heusler alloys in the form of glass-coated microwires and opens the opportunity to achieve higher efficiency of magnetocaloric effect by a slight change of alloy’s composition." @default.
• W4283516006 created "2022-06-27" @default.
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• W4283516006 date "2022-10-01" @default.
• W4283516006 modified "2023-10-12" @default.
• W4283516006 title "Analysis of magnetocaloric effect in NiFeGa-based glass-coated microwires" @default.
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• W4283516006 doi "https://doi.org/10.1016/j.jmmm.2022.169646" @default.
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