we observe high values of MR/Ms at the same temperatures. We also observe a sharp increase in the MR/Ms value
at 700 °C for a very short annealing time. Such increase corresponds to the fragmentation of the martensitic phase due to its
reversion. A similar but no so sharp increase of MR/Ms ratio is also observed for annealing at 600 °C. It is clear that drastic changes in the microstructure occurs in the first 40 min of annealing at 600 °C and in much lower annealing time at 700 °C.