Abstract
The growth rate of Er-Ba-Cu-O bulk superconductor as a function for 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.
Original language | English |
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Pages (from-to) | 699-706 |
Number of pages | 8 |
Journal | Superconductor Science and Technology |
Volume | 16 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2003 Jun 1 |
Externally published | Yes |
ASJC Scopus subject areas
- Ceramics and Composites
- Condensed Matter Physics
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry