Melt processing and enhanced superconducting properties of single domain (Sm0.5Eu0.5)123 superconductors fabricated in air

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11 Citations (Scopus)

Abstract

High-quality single domain (Sm0.5Eu0.5)Ba2Cu3O7-δ superconductors were grown in air with a thermal gradient. We found that the substitution of Ba by rare earth (RE) elements was considerably suppressed when the growth rate is large. Enhanced superconducting properties were obtained by further controlling initial compositions and combining a post-annealing in Ar. The crystals exhibited a high Tc value of 95 K with a sharp superconducting transition, and a well-developed secondary peak effect in the Jc-B curve at 77 K. TEM observation revealed that the nano-sized chemical variation between RE and Ba provided robust flux pinning.

Original languageEnglish
Pages (from-to)675-678
Number of pages4
JournalSuperconductor Science and Technology
Volume15
Issue number5
DOIs
Publication statusPublished - 2002 May
Externally publishedYes

Fingerprint

Flux pinning
Rare earth elements
Thermal gradients
Rare earths
Superconducting materials
Substitution reactions
rare earth elements
Annealing
Transmission electron microscopy
Crystals
flux pinning
air
Processing
Air
Chemical analysis
substitutes
gradients
transmission electron microscopy
annealing
curves

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

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abstract = "High-quality single domain (Sm0.5Eu0.5)Ba2Cu3O7-δ superconductors were grown in air with a thermal gradient. We found that the substitution of Ba by rare earth (RE) elements was considerably suppressed when the growth rate is large. Enhanced superconducting properties were obtained by further controlling initial compositions and combining a post-annealing in Ar. The crystals exhibited a high Tc value of 95 K with a sharp superconducting transition, and a well-developed secondary peak effect in the Jc-B curve at 77 K. TEM observation revealed that the nano-sized chemical variation between RE and Ba provided robust flux pinning.",
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T1 - Melt processing and enhanced superconducting properties of single domain (Sm0.5Eu0.5)123 superconductors fabricated in air

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AU - Sakai, Naomichi

AU - Murakami, Masato

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AB - High-quality single domain (Sm0.5Eu0.5)Ba2Cu3O7-δ superconductors were grown in air with a thermal gradient. We found that the substitution of Ba by rare earth (RE) elements was considerably suppressed when the growth rate is large. Enhanced superconducting properties were obtained by further controlling initial compositions and combining a post-annealing in Ar. The crystals exhibited a high Tc value of 95 K with a sharp superconducting transition, and a well-developed secondary peak effect in the Jc-B curve at 77 K. TEM observation revealed that the nano-sized chemical variation between RE and Ba provided robust flux pinning.

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