Melt processing and characterization of bulk NdBaCuO

被引：6
|
作者：
Monot-Laffez, I [1 ]
Tancret, F [1 ]
Guilmeau, E [1 ]
Desgardin, G [1 ]
Raveau, B [1 ]
机构：
[1] ISMRA, CNRS, UMR 6508, Lab CRISMAT, F-14050 Caen, France
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2000年 / 13卷 / 06期
关键词：
D O I：
10.1088/0953-2048/13/6/305
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Nd1+xBa2-xCU3O7-delta (Nd123) bulk superconductors have been synthesized under air and by the oxygen-controlled melt growth method (OCMG). We have studied the effects of Nd4Ba2Cu2O10 (Nd422) additions, processing rates and doping effects on the microstructure and the superconducting properties in the OCMG-processed samples. Unlike the YBCO system, platinum doping or Nd422 additions do not refine the Nd422 secondary phase inclusions. On the other hand, Ce doping is effective in Nd422 refinement as in the YBCO system. The nucleation window has been determined for growth conditions in air, and was found to be in a very narrow temperature range. The effectiveness of the MgO single crystal used as seed, the occurrence of solid solution and the oxygen content are also examined. Good superconducting properties were obtained in OCMG samples while poor properties occurred in the air-textured sample and cerium-doped samples.
引用
收藏
页码：655 / 659
页数：5
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