Abstract
We investigated applying high magnetic field gradients during solidification of Tb0.27Dy0.73Fe1.95 alloys, finding that they increased the magnetostrictive performance of the alloys. With the application of the high magnetic field gradients, a segregation distribution of the magnetostriction in the alloys was obtained. The lower parts of the alloys showed a better magnetostrictive performance than those of the upper parts. The (Tb,Dy)Fe2 phase exhibited a strong <111> orientation in the lower parts, but a random orientation in the upper parts. We attributed the enhancement of the magnetostriction in the lower parts, mainly, to the <111> orientation of the (Tb,Dy)Fe2 phase in these parts induced by the magnetic field gradients.
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