Repulsive magneto-structural interaction in the ferromagnetic shape memory alloys Ni2Mn1+xIn1−x

► The phase diagram of Ni2Mn1+xIn1−x is analyzed by using the Landau theory. ► The magneto-structural interaction is found to be repulsive. ► The reentrant ferromagnetism and metamagnetism originate from the repulsion. ► The magnetic field can suppress out the martensitic distortion. ► The uniaxial pressure or tension can dominate appearance of the ferromagnetism.