Abstract
The physical properties of the Heusler alloys are of great interest for both basic research and technological applications because of their magnetic properties and structural transformation. Due to potential application as magnetic actuators, the Heusler alloys based on Ni and Mn transition metals have been extensively investigated [1–9]. Ni2MnGa is a vastly studied ferromagnetic shape memory alloy with martensitic transformation [5–7]. Here, we focused on electronic properties of Ni2MnGa1−xGex, whose magnetic properties and temperature of martensitic transformation have been experimentally studied earlier [8]. The structural transformation of Ni–Mn–Sn from austenite to martensite phase has been studied by various experimental methods [1]. It was observed that the strength of the exchange interaction in both phases change substantially upon transformation from one phase to another. Attention has been devoted to Ni50Mn34Sn16 in [4] because of its large magnetocaloric effect. Moreover, film samples of Ni50Mn50−xSnx exhibited signs of martensitic transformation [2, 9], too.
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