Magnetic domain structure, crystal orientation, and magnetostriction of Tb0.27Dy0.73Fe1.95 solidified in various high magnetic fields

In this paper, we studied how applying a high magnetic field during solidification of Tb0.27DY0.73Fe1.95 alloys affected their magnetic domain structure, crystal orientation, and magnetostriction. We observed the morphology of the magnetic domain during solidification, finding it change with the applied field: from fiber like (0 T) to dot like and closure mixed (4.4 T) to fiber like (8.8 T) to fishbone like (11.5 T). The alloy solidified at 4.4 T showed the best contrast of light and dark in its domain image, widest magnetic domain, fastest magnetization, and highest magnetostriction; this alloy is followed in descending order by the alloys solidified at 11.5 T, 8.8 T, and 0 T. The orientation of the (Tb, Dy)Fe-2 phase changed with magnetic field from random (OT) to < 111 > < 4.4 T > to < 113 > < 8.8 T > to < 110 > (11.5 T). The improvement in magnetostriction was likely caused by modification of both the magnetization process and the alloy microstructure. (C) 2015 Elsevier B.V. All rights reserved.