Analysis of structural and thermomagnetic properties in hexagonal Fe₅₀Mn₃₅Sn₁₅ alloy

An off-stoichiometric \(\hbox {Fe}_{2}\) ${\text{Fe}}_2$ MnSn alloy was prepared by vacuum arc melting and homogenized by vacuum annealing. The structural analysis indicated that the alloy exhibits a \(\hbox {D0}_{19}\) ${\text{D0}}_{19}$ hexagonal structure. Isothermal magnetization analysis at room temperature showed soft ferromagnetic behavior and exchange magnetic anisotropy. Furthermore, the isofield magnetization study revealed a Curie temperature ( \(\hbox {T}_{c}\) ${\text{T}}_c$ ) of 455 K with a second-order magnetic phase transition. A similar trace of the transition point was observed in the differential scanning calorimetric analysis. We estimated a magnetic entropy change ( \(\Delta \hbox {S}_{M}\) $\mathrm{\Delta }{\text{S}}_M$ = − 4 J \(\hbox {kg}^{-1}\) ${\text{kg}}^{-1}$ \(\hbox {K}^{-1}\) ${\text{K}}^{-1}$ ) and refrigerant capacity (RC = 116 J \(\hbox {kg}^{-1}\) ${\text{kg}}^{-1}$ ) from M-T measurements, highlighting its potential for thermomagnetic generators and magnetic refrigerator applications.