MAGNETIC AND MAGNETOELASTIC STUDIES OF SINGLE-CRYSTAL TB0.6DY0.4ZN ATLOW-TEMPERATURES

The alloys series Tb1-xDyxZn, x less than or equal to 0.6, has been sh own to undergo easy-axis reorientations at low temperatures. In this p aper results of magnetization on single crystal disks of Tb0.6Dy0.4Zn are reported. Maxima in the magnetization as much as 15 degrees from t he [100] axes were found below T-R congruent to 20 K, Magnetostriction s of 5 x 10(-3) were measured at 77 K on single crystal rods. Magnetiz ation versus field curves under a series of compressive stresses have verified the highly magnetoelastic nature of this alloy, The non-princ ipal magnetization orientations are discussed on a phenomenological mo del which includes an eighth-order anisotropy term.