Superconducting properties and microstructures of Er-Ba-Cu-O superconductor

被引：5
|
作者：
Iida, K [1 ]
Yoshioka, J [1 ]
Sakai, N [1 ]
Murakami, M [1 ]
机构：
[1] Int Superconduct Technol Ctr, Superconduct Res Lab, Div 3, Morioka, Iwate 0200852, Japan
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2003年 / 16卷 / 06期
关键词：
D O I：
10.1088/0953-2048/16/6/308
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The growth rate of Er-Ba-Cu-O bulk superconductor as a function of undercooling was investigated using an isothermal solidification technique. The behaviour of the growth rate of Er-Ba-Cu-O under various undercooling was similar to that of Y-Ba-Cu-O. Furthermore, macro-segregation of Er211 was also observed in the a and c growth regions. However, macro-segregation of Er211 was not observed in the Er123 crystal fabricated by a continual slow cooling method far from the seed crystal. The optimum concentration of Er211 was determined to be Er123:Er211 = 3:1 on the basis of microstructure analysis and SQUID measurements. Furthermore, the trapped field capability as well as the critical current density of Er-Ba-Cu-O bulk superconductor with an optimum composition fabricated by a continual slow cooling method employing very small particles of Er211 was dramatically improved.
引用
收藏
页码：699 / 706
页数：8
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