Magnetics, Magetostriction, and Spin Reorientation of Tb0.3Dy0.6Pr0.1(Fe1-xAlx)1.95 Alloys with Substitution of Fe by Al

The effects of Al substitution for Fe on the structure, magnetism, magnetostriction, anisotropy and spin reorientation of a series of Tb0.3Dy0.6Pr0.1(Fe1-xAlx)1.95 alloys (x=0. 05,0.1,0.15,0.2,0.25,0.3) have been investigated. The alloys of Tb0.3Dy0.6Pr0.1(Fe1-xAlx)1.95 substantially retain MgCu2-type C-15 cubic Laves phase structure when x 0.15. Coercivcity decreases rapidly with increasing of temperature, and appears the maximum value at Al content x=0.20. The magnetostriction of the Tb0.3Dy0.6Pr0.1(Fe1-xAlx)1.95 alloys decreases drastically with increasing x and the giant magnetostrictive effect disappears for x>0.15. Fortunately, a small amount of Al substitution is beneficial to a decrease in the anisotropy. The spin reorientation temperature decreases with increasing x. The magnetic properties are determined by both Pr and Al substitution effects. Keywords-Cubic laves phase; Magnetostriction; Spin reorientation; EMD