Growth and hole density control through equilibrium oxygen annealing of optimally doped Y1-xCaxBa2Cu3O7-δ single crystals

Abstract

We have grown calcium and oxygen co-doped Y1-xCaxBa2Cu3O7-δ single crystals using self-flux method. A method of fine tuning oxygen content to reach the equilibrium state through in situ monitoring of the conductivity change is established. Structural, compositional and electronic property characterizations of optimally co-doped Y1-xCaxBa2Cu3O7-δ crystals indicate that they are high quality equilibrium crystals with a sharp superconducting transition width of 0.2K.

arXiv comment13 pages, 5 figures. published in Superconductor Science and Technology, see http://iopscience.iop.org/0953-2048/22/10/105012/

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