Structure and magnetostriction of (Dy0.7Tb0.3)(0.5)Pr0.5Fex alloys (1.10 <= x <= 1.85)

The structure and magnetostriction of R0.5Pr0.5Fex, (R = Dy0.7Tb0.3; 1.10 l ess than or equal to x less than or equal to 1.85) alloys were investigated . It was found that the matrix of are-melting R0.5Pr0.5Fex, alloys is the ( Dy, Tb, Pr) Fe-2 phase with the MgCu2-type cubic structure and the second p hase is rare earth-rich phase when x<1.25. In the range of 1.40 less than o r equal to x<1.55, the second phase is (Dy, Tb, Pr)Fe-3 and it becomes the main phase when x >1.55. The crystalline structure of mechanically grinding R0.5Pr0.5Fex, alloys is similar to that of the are-melted alloys. The magn etostriction of the alloys increases with increasing Fe content when x less than or equal to 1.25 and decreases when x>1.25.