MAGNETIC AND STRUCTURAL-PROPERTIES OF SUPERCONDUCTING PRBA2CU3OY GROWN BY THE TSFZ METHOD

We report the magnetic and structural properties of single crystal PrB a2Cu3Oy grown by the travelling solvent floating-zone (TSFZ) method. M agnetic susceptibility measurements show that TSFZ PrBa2Cu3Oy has a su perconducting transition below 80 K. Zero-field-cooled magnetization s hows diamagnetism with full volume fraction. The magnetic moment mu(ef f) approaches 2.0 mu(B), and is in good agreement with that of the Pr3 + ion in the presence of a crystal field. The as-grown TSFZ PrBa2Cu3Oy is tetragonal and has a longer c-axis lattice constant than previousl y reported. Structural analysis revealed a larger z positional paramet er of the Ba site in as-grown TSFZ PrBa2Cu3Oy. (C) 1998 Elsevier Scien ce S.A.