Ab initio studies of the effect of nanoclusters on magnetostriction of Fe_(1-x)Ga_x alloys

摘要

Using the density functional calculations, we investigated the effect of nanoprecipitation on the magnetostriction of Fe_(1-x)Ga_x alloys. While the B2-like FeGa clusters undergo slight tetragonal distortion, D0_3-like FeGa clusters remain cubic in the Fe matrix. Moreover, we found that B2-like nanostructures produce negative magnetostriction, whereas D0_3-like nanostructures give small positive magnetostriction in the hypothetical inhomogeneous structures. Therefore, the formation of nanoscale precipitates cannot be the reason for the extraordinary enhancement of magnetostriction of Fe_(1-x)Ga_x alloys.