Abstract
Superconductive PrBa 2Cu 3O 7− y (Pr123) crystals have been grown successfully by the travelling-solvent floating-zone (TSFZ) method using 3.7–5.8% PrO, 27–37% BaO, and 60–69% CuO composition solution with the 0.1–0.4% oxygen mixed argon gas atmosphere. The grown crystals have been identified to be Pr123 by a precession camera, X-ray powder diffractions and scanning electron microscopy–X-ray energy dispersion spectroscopy (SEM-EDS). Some portion of the grown TSFZ crystal boules show bulk superconductivity below about 80 K after annealing in oxygen.
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