Martensitic transformation, magnetotransport properties, and magnetocaloric effect in Ni$_{47-x}$Mn$_{42+x}$In$_{11}$ alloys (0 $\le x \le$ 2)

The structure, electrical and magnetic properties of Ni$_{47-x}$Mn$_{42+x}$In$_{11}$ (0 $\le x\le$ 2) alloys were investigated and discussed with a change in the Ni/Mn ratio. It was found that the change in the type of the crystal lattice during the martensitic transformation is accompanied by a significant change in the electrical resistance by 45–50%. It is shown that all the studied alloys exhibit negative magnetoresistance and an inverse magnetocaloric effect. The maximum magnitude of the magnetoresistance in a magnetic field of 18 kOe was found in the Ni$_{46}$Mn$_{43}$In$_{11}$ alloy. The maximum value of the magnetocaloric effect was observed in the Ni$_{47-x}$Mn$_{42+x}$In$_{11}$ alloy at $Т$ = 325 K.