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This paper reports on a study of the influence of In and Sn substitution for Ga in Ni2MnGa on the magnetism and magnetostriction in arc-melted-and-cast and directionally solidified alloys. Magnetostriction measurements were carried out from room temperature down to -125°C for these alloys. Magnetic property measurements for the stoichiometric as arc-melted-and-cast rods of Ni2MnGa, Ni2MnSn, and Ni2MnIn show room temperature Ms values of 58.8, 44.3, and 39.1 emu/g, respectively. Each of the stoichiometric alloys reveals similar magnetostrictive behavior with respect to temperature. For near-stoichiometric compositions, the behavior of magnetostriction in Ni-Mn-In and Ni-Mn-Sn is comparable to that in Ni-Mn-Ga in the directionally solidified samples.
Date of Publication: July 2006