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- W2960020123 endingPage "113691" @default.
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- W2960020123 abstract "The crystal structure, transformation property and magnetocaloric effect (MCE) were investigated in Ni55.5Mn17.8Ga26.7 alloy. The sample at room temperature exhibits an unmodulated martensitic structure with a small residual trace of 7 M modulated martensitic structure. Two successive magneto-structural transformations (MSTs) consisting of martensitic and intermartensitic transformations are observed. It is found that the maximum isothermal entropy change |ΔS|max of 7.65 J/kg K at 309 K and refrigeration capacity (RC) of 78.84 J/kg are attained for a field change μ0ΔH = 3 T under ambient pressure (p = 0 GPa). The enhanced MCE can be ascribed to the two successive MSTs. Much importantly, the |ΔS|max is basically independent of hydrostatic pressure and equals to 7.74 J/kg K at 314 K for p = 0.622 GPa. Besides, the application of hydrostatic pressure improve the width of phase transition and a large RC of 101.57 J/kg has been observed for p = 0.622 GPa under μ0ΔH = 3 T. Consequently, the response of RC to magnetic field increases from 26.86 J/kg T for p = 0 GPa to 34.13 J/kg T for p = 0.622 GPa. The reversible RC is also improved by pressure. Such an enhanced MCE and the non-toxic raw materials make this alloy particularly appealing for solid-state cooling technologies." @default.
- W2960020123 created "2019-07-23" @default.
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- W2960020123 date "2019-10-01" @default.
- W2960020123 modified "2023-10-18" @default.
- W2960020123 title "Enhanced magnetocaloric effects driven by two successive magneto-structural transformations in Ni55.5Mn17.8Ga26.7 alloy under hydrostatic pressure" @default.
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- W2960020123 doi "https://doi.org/10.1016/j.ssc.2019.113691" @default.
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