Structural and magnetic transformations in Ni$_{51-x}$Mn$_{36+x}$Sn$_{13}$ alloys

The structural and magnetic phase transitions in Ni–Mn–Sn-based alloys have been studied. The temperature dependences of the martensitic and magnetic phase transformations in Ni$_{51-x}$Mn$_{36+x}$Sn$_{13}$ (0 $\le x\le$ 4) have been determined in the case where manganese atoms substitute for nickel atoms. For the studied alloys, the concentration phase diagram has been constructed and the temperature regions of the existence of the high-temperature austenite phase $L2_1$ and the low-temperature martensite phase in different magnetic states have been determined.