Magnetic Behavior of Single Crystalline Pr5Ge3 and Tb5Ge3Compounds
Abstract
The results of the magnetization studies on Pr5Ge3and Tb5Ge3 single crystals are reported. Single Crystals of Pr5Ge3 and Tb5Ge3 compounds were successfully grown by Czochralski method. These compounds crystallize in a Mn5Si3 type hexagonal structure with space group P63/mcm. Ferromagnetic correlations set in at around 36 K in Pr5Ge3 in the ab plane followed by an antiferromagnetic transition at 13 K. Along the c-axis the magnetization shows a ferromagnetic transition around 13 K with an overall ferrimagnetic behavior. At 2K, the magnetic isotherm of the compound along [0001] direction is typical for a ferromagnet, while a field induced ferromagnetic type response is observed along the [1010] direction. Hexagonal ab plane or [1010] direction was found to be the easy axis of magnetization. Tb5Ge3 orders antiferromagneticaly at 85 K with the hexagonal ab plane as easy axis of magnetization. The compound shows a field induced ferromagnetic behavior in its magnetic isotherm at 2 K.