Magnetic and structural properties of superconducting PrBa2Cu3Oy grown by the TSFZ method

We report the magnetic and structural properties of single crystal PrBa2Cu3Oy grown by the travelling solvent floating-zone (TSFZ) method. Magnetic susceptibility measurements show that TSFZ PrBa2Cu3Oy has a superconducting transition below 80 K. Zero-field-cooled magnetization shows diamagnetism with full volume fraction. The magnetic moment μeff approaches 2.0 μB, 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 previously reported. Structural analysis revealed a larger z positional parameter of the Ba site in as-grown TSFZ PrBa2Cu3Oy. (orig.)