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 |
|---|---|
| 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 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Superconducting properties and microstructures of Er-Ba-Cu-O superconductor. / Iida, K.; Yoshioka, J.; Sakai, Naomichi; Murakami, Masato.
In: Superconductor Science and Technology, Vol. 16, No. 6, 06.2003, p. 699-706.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Superconducting properties and microstructures of Er-Ba-Cu-O superconductor
AU - Iida, K.
AU - Yoshioka, J.
AU - Sakai, Naomichi
AU - Murakami, Masato
PY - 2003/6
Y1 - 2003/6
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0037561521&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037561521&partnerID=8YFLogxK
U2 - 10.1088/0953-2048/16/6/308
DO - 10.1088/0953-2048/16/6/308
M3 - Article
VL - 16
SP - 699
EP - 706
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 6
ER -