Phase relationships and magnetic properties of TbxDy1−xFe1.95 alloys

► Vol. fraction of (Tb,Dy)Fe3 is minimum at x = 0.4 and maximum at x = 0.6 composition. ► Widmanstatten precipitate forms in the x ⩽ 0.5 alloys and is absent for x > 0.5 alloys. ► Phase field of (Tb,Dy)Fe2 extends towards rare earth-rich side for x ⩽ 0.5 alloys. ► Phase field of Laves phase shifts towards Fe-rich side with Tb addition. ► λ Increases with Tb addition and slope of the λ-H curve is maximum for x = 0.4 alloy.