Preparation of NdBaCuO superconductor by zone-melting under low oxygen partial pressure

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• 作者：Fan ; Zhanguo ; Gao ; Weiying ; Li ; Fenghua ; Wang ; Jue ; Soh ; Deahua
• 关键词：74.62.Bf ; 74.70.&minus ; b ; Nd123 superconductor ; Low oxygen partial pressure ; Zone-melting
• 刊名：Physica C
• 出版年：2003
• 出版时间：April 15, 2003
• 年：2003
• 卷：386
• 期：Complete
• 页码：241-244
• 全文大小：105 K

文摘

If the NdBaCuO superconductor samples were zone-melted in low oxygen partial pressure (1 % O₂+99 % Ar), the zone-melting temperature was decreased about 120 °C from that (1060 °C) of sample melted in air. Thus the loss of liquid phase (BaCuO₂ and CuO) was reduced during the zone-melting process. The content of non-superconducting phase Nd422 in zone-melted NdBaCuO samples was clearly decreased, so was the substitution of Nd for Ba. The superconductivity of zone-melted Nd_1+xBa_2−xCu₃O_y prepared under low oxygen partial pressure was distinctively improved.