Abstract
The effects of oxygen partial pressure on Y123 single-crystal growth, morphology and properties were investigated. YBCO (Y123) single crystals were fabricated using the crystal pulling method under 1 atm oxygen pressure. Compared with crystals fabricated under air atmosphere, it was found that this high oxygen partial pressure played a significant role in increasing growth rate, which was 1.5–2.5 times higher than that of crystals fabricated under air atmosphere. A large crystal with size of 19.8×19.5 mm2 in the a–b plane and 16.5 mm in the c-axis direction was successfully obtained using a crucible 50 mm in diameter. In the YBCO system, critical temperature T c was not sensitive to the growth atmosphere.
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