Martensitic transformation and magnetic properties in ferromagnetic shape memory alloy Ni43Mn46Sn11−xSix

Martensitic transition, spin glass behavior and enhanced exchange bias in Si substituted Ni50Mn36Sn14 Heusler alloys

“…It is observed that an increase in the Si concentration results in a decrease in the martensitic transition temperature (T M ) [see Table 2] which is contrary to the previous reports. 22,23 Generally, the variation of T M is correlated with the valence electron concentration e/a (electrons per atom), inter atomic distance, strain etc. 24 It was reported that in many alloys with increasing e/ a value, the martensitic transition temperature also increases.…”

Effect of quenching rate on the average grain size and martensitic transformation temperature in rapidly solidified polycrystalline Ni50Mn37Sn13 alloy ribbons

“…These materials were first reported by Sutou et al in 2004 . Most of the work reported in the literature to tune M S in these materials involves: (i) changes of the Mn/X ratio ; (ii) the partial atomic substitution of one (or more) of the three main elements of the alloy by other elements ; and (iii) the introduction of elements of small atomic radius into interstitial sites . In addition, it is also known that different models correlate the average grain size of a polycrystalline shape memory alloy with M S , but, as far as we know, an understanding of the M S dependence with the average grain size of NiMnX alloys (X = Sn, In, Sb) has been less considered.…”

Martensitic transformation, magnetic entropy, and adiabatic temperature changes in bulk and ribbon Ni48Mn39.5Sn12.5−xInx (x = 2, 4, 6) metamagnetic shape memory alloys

“…Along the electronic structure modifications also, structural geometry change is noted as a factor affecting both T MT and T A C temperatures. For instance, the isoelectronic substitution by an element with the same number of valence electrons but lower atomic radii may result in unit cell volume reduction, which can increase T MT and simultaneously decrease T [56] alloys. This effect may arise from the modified d Mn -d Mn distance and stronger hybridization between Ni and Mn atoms in a reduced unit cell volume leading to higher density of states (DOS) near the Fermi level, which may then promote MT.…”