Abstract
Effects of 1 T external magnetic field on the transformation strains and resistivity changes associated with martensitic transformation in Ni2MnGa single crystals have been investigated by simultaneously monitoring the variations in strain and electrical resistivity with temperature. The results show that the strains on transforming from austenite to martensite are larger than that for the reverse transformation when the transformation takes place under 1 T external magnetic field. The reason for larger transformation strain mainly arises from the growth of favorable martensitic twin variants under external magnetic field rather than the magnetic field effect on the shift of martensitic transformation temperatures.
Published Version
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