Magnetic properties of RZn with R=Tb/sub 1-x/Dy/sub x/ (0/spl les/x/spl les/0.6) and R=Tb/sub 1-y/Gd/sub y/ (0/spl les/y/spl les/0.4)

Magnetization, Young's moduli, and magnetostriction were measured on polycrystalline samples of Tb/sub 1-x/Dy/sub x/Zn and Tb/sub 1-y/Gd/sub y/Zn. The easy axis phase boundary was determined for 0/spl les/x/spl les/0.6 and 0/spl les/y/spl les/0.4. To derive temperature dependencies of Young's moduli, small transducer rings were excited into resonance at frequencies /spl sim/100 kHz. Estimated magnetomechanical coupling factors of polycrystalline Tb/sub 0.8/Gd/sub 0.2/Zn in the region of easy axis reorientation are /spl sim/0.6. Magnetostrictions of polycrystalline TbZn at 77 K saturated at /spl sim/0.2% with relatively low fields (/spl sim/1000 Oe), even for compressive stresses >40 MPa.