Magnetization and magnetostriction of Tb1-xDyxZn single crystals

Magnetization, magnetostriction, and elastic modulus measurements were made on single crystal specimens of Tb1-xDyxZn. Easy axis magnetization rotatio n as much as 26 degrees were observed in the (001) plane of Tb0.75Dy0.25Zn below 33 K. From these measurements, values of the K-4/K-8 anisotropy ratio s were calculated. No easy axis magnetization rotation was observed in the x=0.6 and x=0.8 single crystals. Magnetostriction and modulus measurements at 77 K in Tb0.4Dy0.6Zn showed a saturation magnetostriction of similar to 5x10(-3) and a maximum magnetomechanical coupling factor of 0.96. (C) 1999 American Institute of Physics. [S0021-8979(99)23308-7].