It is known that the remanence is the ability of a material to retain magnetization. Indeed, the ratio MR/Ms (also called squareness ratio) measures how “square” a given hysteresis loop is [20]. Regarding the present work, it was found a linear increase of the remanence with strain (see the inset of Fig. 5b). The main panel of Fig. 5(b) shows the behavior of MR/Ms ratio as function of strain. Note that there is an evident decrease in the MR/Ms ratio between 20% and 40% thickness reduction. For the same strain range, it was observed the largest decrease in Hc, as depicted in Fig. 5(a). According to ref. [6], the results displayed in Fig. 5 suggest that the pronounced decrease in MR/Ms ratio also mirrors a decrease in the shape magnetic anisotropy of α0-martensite phase in the strain range 0.2–0.5. However, we have to keep in mind that the evolution of the MR/MS ratio can possibly be affected by magneto-elastic effects (Villari effect) [20]