Growth of single crystal PrFeAsO1−y and its characterization

We have successfully grown single crystals of oxygen deficient oxypnictide superconductor PrFeAsO1−y using high pressure synthesis technique. Typical crystal size is about 600 × 800 × 30 μm3, with its Tc = 44 K. Their resistivity measurements under magnetic field yield the anisotropic factor Γ ∼ 5, consistent with previous results on smaller single crystals.