Martensitic Transformations and Magnetic Properties of Ni-Mn-Sn Heusler Alloy Films

Abstract

We report on structural and magnetic properties of Ni50Mn50−xSnx (x = 12 ÷ 14) films and compare them with those of the bulk Ni-Mn-Sn alloys. Magnetic measurements reveal clear presence of martensitic transformation in bulk alloys but in the flash-evaporated Ni-Mn-Sn thin films martensitic transformation is usually less visible. The best film samples annealed for 1 h at about 900 K exhibit clear signs of martensitic transformation: i.e., a small defect in magnetization and a substantial increase in ferromagnetic resonance line width.

Electronic Structure and Magnetic Properties of Ni2MnGa1-xGexand Disordered Ni2MnSn Heusler Alloys

“…Attention has been devoted to Ni 50 Mn 34 Sn 16 in [4] because of its large magnetocaloric effect. Moreover, film samples of Ni 50 Mn 50−x Sn x exhibited signs of martensitic transformation [2,9], too.…”

“…Due to potential application as magnetic actuators, the Heusler alloys based on Ni and Mn transition metals have been extensively investigated [1][2][3][4][5][6][7][8][9]. Ni 2 MnGa is a vastly studied ferromagnetic shape memory alloy with martensitic transformation [5][6][7].…”