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A multistep superelastic behavior, with up to a 12% strain, is reported in a 〈001〉P-oriented

Ni49Mn28Ga23single crystal. The observed behavior is produced by intermartensitic 

transformations during the tensile stress–strain measurements at temperatures between

−140 °C and +60 °C. The tensile stress–temperature phase diagram and the stress dependence

of the intermartensitictransformationentropies have been obtained. These results provide

important input for theoretical modeling of the phase transformations in these alloys and show

promising mechanical properties of the classical Ni-Mn-Ga ferromagnetic shape memoryalloys.
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