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 |
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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 1 |
Externally published | Yes |
Event | 2002 Applied Superconductivity Conference - Houston, TX, United States Duration: 2002 Aug 4 → 2002 Aug 9 |
Keywords
- Chemical substitution
- Cooling rate
- Hot-seeding
- Melt-process
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering