Abstract
Hot-seeding melt growth of large (Sm-Eu)123 single domains has been investigated in air with Nd123 seeds. A homogenization at the partial molten state, which was achieved by annealing at 1100 °C for half an hour and at 1070 °C for 2 to 4 hours before seeding, was the key to the growth of large single domains with a diameter more than 3 cm. After seeding one sample was grown in a slow cooling at 0.3 °C/hour for 120 hours. The other sample was grown with a fast cooling at a rate of 2 °C/hour for 15 hours followed by a 0.3 °C/hour slow cooling for 100 hours. The measurements of local Tc and Jc values over the entire bulks evidenced that a large spatial variation in the superconducting properties was observed in the sample grown with the former thermal schedule, while the latter thermal profile favored the growth of near stoichiometric (SmxEu1-x) Ba2Cu3O7-δ over the whole processing and thereby significantly enhanced the field trapping capacity.
| Original language | English |
|---|---|
| Pages (from-to) | 3079-3082 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 13 |
| Issue number | 2 III |
| DOIs | |
| Publication status | Published - 2003 Jun |
| Externally published | Yes |
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Keywords
- Chemical substitution
- Cooling rate
- Hot-seeding
- Melt-process
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Physics and Astronomy (miscellaneous)
Cite this
Hot-seeding melt growth of large (Sm-Eu) 123 single domains in air with controlled chemical substitutions. / Hu, A.; Sakai, Naomichi; Murakami, Masato.
In: IEEE Transactions on Applied Superconductivity, Vol. 13, No. 2 III, 06.2003, p. 3079-3082.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Hot-seeding melt growth of large (Sm-Eu) 123 single domains in air with controlled chemical substitutions
AU - Hu, A.
AU - Sakai, Naomichi
AU - Murakami, Masato
PY - 2003/6
Y1 - 2003/6
N2 - Hot-seeding melt growth of large (Sm-Eu)123 single domains has been investigated in air with Nd123 seeds. A homogenization at the partial molten state, which was achieved by annealing at 1100 °C for half an hour and at 1070 °C for 2 to 4 hours before seeding, was the key to the growth of large single domains with a diameter more than 3 cm. After seeding one sample was grown in a slow cooling at 0.3 °C/hour for 120 hours. The other sample was grown with a fast cooling at a rate of 2 °C/hour for 15 hours followed by a 0.3 °C/hour slow cooling for 100 hours. The measurements of local Tc and Jc values over the entire bulks evidenced that a large spatial variation in the superconducting properties was observed in the sample grown with the former thermal schedule, while the latter thermal profile favored the growth of near stoichiometric (SmxEu1-x) Ba2Cu3O7-δ over the whole processing and thereby significantly enhanced the field trapping capacity.
AB - Hot-seeding melt growth of large (Sm-Eu)123 single domains has been investigated in air with Nd123 seeds. A homogenization at the partial molten state, which was achieved by annealing at 1100 °C for half an hour and at 1070 °C for 2 to 4 hours before seeding, was the key to the growth of large single domains with a diameter more than 3 cm. After seeding one sample was grown in a slow cooling at 0.3 °C/hour for 120 hours. The other sample was grown with a fast cooling at a rate of 2 °C/hour for 15 hours followed by a 0.3 °C/hour slow cooling for 100 hours. The measurements of local Tc and Jc values over the entire bulks evidenced that a large spatial variation in the superconducting properties was observed in the sample grown with the former thermal schedule, while the latter thermal profile favored the growth of near stoichiometric (SmxEu1-x) Ba2Cu3O7-δ over the whole processing and thereby significantly enhanced the field trapping capacity.
KW - Chemical substitution
KW - Cooling rate
KW - Hot-seeding
KW - Melt-process
UR - http://www.scopus.com/inward/record.url?scp=0042967683&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0042967683&partnerID=8YFLogxK
U2 - 10.1109/TASC.2003.812108
DO - 10.1109/TASC.2003.812108
M3 - Article
VL - 13
SP - 3079
EP - 3082
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 2 III
ER -