Hot-seeding melt growth of large (Sm-Eu) 123 single domains in air with controlled chemical substitutions

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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 languageEnglish
Pages (from-to)3079-3082
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume13
Issue number2 III
DOIs
Publication statusPublished - 2003 Jun
Externally publishedYes

Fingerprint

inoculation
Substitution reactions
substitutes
Cooling
cooling
air
Air
schedules
homogenizing
Seed
Molten materials
seeds
trapping
Annealing
annealing
Processing
profiles
Hot Temperature

Keywords

  • Chemical substitution
  • Cooling rate
  • Hot-seeding
  • Melt-process

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

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title = "Hot-seeding melt growth of large (Sm-Eu) 123 single domains in air with controlled chemical substitutions",
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.",
keywords = "Chemical substitution, Cooling rate, Hot-seeding, Melt-process",
author = "A. Hu and Naomichi Sakai and Masato Murakami",
year = "2003",
month = "6",
doi = "10.1109/TASC.2003.812108",
language = "English",
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pages = "3079--3082",
journal = "IEEE Transactions on Applied Superconductivity",
issn = "1051-8223",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "2 III",

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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

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U2 - 10.1109/TASC.2003.812108

DO - 10.1109/TASC.2003.812108

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JF - IEEE Transactions on Applied Superconductivity

SN - 1051-8223

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