Magnetic Phase Diagram of Heusler alloy system Ni_2Mni_(1-x)Cr_xGa

摘要

The temperature dependence of the electrical resistivity p of Ni_2Mn_(1-x)Cr_xGa (x=0.05~0.25) was measured. Two anomalies corresponding to the magnetic and structural phase transitions at T_c and T_M were observed on the p-T curves for each sample, respectively. The kinks corresponding to the premartensitic transition at Tp were observed for all samples except x=0.25. On the basis of the experimental results, the T vs. x phase diagram of Ni_2Mn_(1-x)Cr_xGa was determined.