The structure, transition properties, and hydrostatic pressure (p) and magnetic field (B) dependence of transition temperatures and operation-temperature window (ΔT, defined as the temperature range of martensitic transition) were investigated in Ni₅₃Mn₂₁Ga₂₆ alloy. The results reveal that all the transition temperatures and ΔT increase almost linearly with increasing magnetic field and pressure. Particularly, a stronger dependence of peak temperature (T_M) and ΔT on pressure, dT_M/dp = 25.7 K/GPa and dΔT/dp = 18.7–22.7 K/GPa, is observed in contrast with the smaller values of dT_M/dB = 1.3 K/T and dΔT/dB = 1.4–1.7 K/T found in Ni₅₃Mn₂₁Ga₂₆ alloy. Furthermore, the value of 25.7 K/GPa may be the largest shift in T_M with pressure observed in polycrystalline Ni–Mn-Ga systems. Clearly, the sensitivities of T_M and ΔT to pressure are much higher than those to magnetic field. These findings illustrate that applying hydrostatic pressure is beneficial to broaden ΔT in Ni₅₃Mn₂₁Ga₂₆ alloy.

在Ni ₅₃ Mn ₂₁ Ga ₂₆合金中研究了转变温度和工作温度窗口（ΔT，定义为马氏体转变温度范围）的结构，转变特性，静压力（p）和磁场（B）的依赖性。。结果表明，所有的转变温度和ΔT都随着磁场和压力的增加而线性增加。特别是，更强的峰值温度的依赖性（Ť_中号）和Δ Ť上压力峰，d Ť_中号/ d p  = 25.7 K / GPA和Dδ Ť/ d p  = 18.7-22.7 K / GPA，相反，观察到与d的值越小Ť_中号/ d乙 = 1.3 K / T和Dδ Ť / d乙 = 1.4-1.7 K / T IN镍发现₅₃锰₂₁ Ga ₂₆合金。此外，在多晶Ni-Mn-Ga系统中观察到的压力下，25.7 K / GPa的值可能是T _M的最大位移。显然，T _M和ΔT对压力的敏感性远高于对磁场的敏感性。这些发现说明施加静水压力有利于扩大Ni ₅₃ Mn中的ΔT₂₁ Ga ₂₆合金。