SUPERCONDUCTING AND MAGNETIC-PROPERTIES OF DYNI2B2C SINGLE-CRYSTALS

We have investigated the superconducting and magnetic properties of Dy Ni2B2C single crystals for applied fields parallel and perpendicular t o the c-axis. Magnetisation measurements show that this compound has h ighly anisotropic properties in both the normal and the superconductin g state. The normal state susceptibility follows a Curie-Weiss tempera ture dependence for applied field perpendicular to the c-axis and a mu ch weaker temperature dependence if the field is along the c-axis. For magnetic fields applied perpendicular to the c-axis, the magnetisatio n versus field curves show anomalies below T-N with clear discontinuit ies and eventual saturation for H > 30 kOe, while showing a normal par amagnetic behaviour when the held is applied along the c-axis.