Transport critical current density of Ag-sheathed Bi-Sr-Ca-Cu-O multifilament superconductor tapes with magnetic nanopowders γ-Fe 2O3

Roslan Abd. Shukor, S. Y. Yahya, Mohammad Hafizuddin Jumali, I. Hamadneh, S. A. Halim

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Abstract

The transport critical current density of multifilament Ag/Bi-Sr-Ca-Cu-O tapes with the addition of magnetic nanopowder (γ-Fe2O 3) has been measured. The tapes were prepared using the powder in tube method with 30 filaments. Three types of Bi-Sr-Ca-Cu-O starting materials namely from solid state reaction without γ-Fe2O3, solid state reaction with γ-Fe2O3 addition and ultrafine powders prepared by coprecipitation method with γ-Fe 2O3 have been used. The starting composition of the γ-Fe2O3 added samples is Bi1.6Pb 0.4Sr2Ca2Cu3O10-(γ- Fe2O3)0.01. The first intermediate rolling enhances Jc but subsequent rolling shows no improvement in J c. Tapes prepared from coprecipitation powders with γ-Fe 2O3 added showed the highest Jc of 7890 A/cm2 at 77 K and in self-field after the first intermediate rolling. These results suggest that intermediate rolling and magnetic nanopowders can be used to improve the critical current density of multifilament Ag/Bi-Sr-Ca-Cu-O superconductor tapes.

Original languageEnglish
Article number018
Pages (from-to)71-74
Number of pages4
JournalJournal of Physics: Conference Series
Volume43
Issue number1
DOIs
Publication statusPublished - 1 Jun 2006

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BSCCO superconductors
tapes
critical current
current density
solid state
filaments
tubes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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title = "Transport critical current density of Ag-sheathed Bi-Sr-Ca-Cu-O multifilament superconductor tapes with magnetic nanopowders γ-Fe 2O3",
abstract = "The transport critical current density of multifilament Ag/Bi-Sr-Ca-Cu-O tapes with the addition of magnetic nanopowder (γ-Fe2O 3) has been measured. The tapes were prepared using the powder in tube method with 30 filaments. Three types of Bi-Sr-Ca-Cu-O starting materials namely from solid state reaction without γ-Fe2O3, solid state reaction with γ-Fe2O3 addition and ultrafine powders prepared by coprecipitation method with γ-Fe 2O3 have been used. The starting composition of the γ-Fe2O3 added samples is Bi1.6Pb 0.4Sr2Ca2Cu3O10-(γ- Fe2O3)0.01. The first intermediate rolling enhances Jc but subsequent rolling shows no improvement in J c. Tapes prepared from coprecipitation powders with γ-Fe 2O3 added showed the highest Jc of 7890 A/cm2 at 77 K and in self-field after the first intermediate rolling. These results suggest that intermediate rolling and magnetic nanopowders can be used to improve the critical current density of multifilament Ag/Bi-Sr-Ca-Cu-O superconductor tapes.",
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AU - Abd. Shukor, Roslan

AU - Yahya, S. Y.

AU - Jumali, Mohammad Hafizuddin

AU - Hamadneh, I.

AU - Halim, S. A.

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Y1 - 2006/6/1

N2 - The transport critical current density of multifilament Ag/Bi-Sr-Ca-Cu-O tapes with the addition of magnetic nanopowder (γ-Fe2O 3) has been measured. The tapes were prepared using the powder in tube method with 30 filaments. Three types of Bi-Sr-Ca-Cu-O starting materials namely from solid state reaction without γ-Fe2O3, solid state reaction with γ-Fe2O3 addition and ultrafine powders prepared by coprecipitation method with γ-Fe 2O3 have been used. The starting composition of the γ-Fe2O3 added samples is Bi1.6Pb 0.4Sr2Ca2Cu3O10-(γ- Fe2O3)0.01. The first intermediate rolling enhances Jc but subsequent rolling shows no improvement in J c. Tapes prepared from coprecipitation powders with γ-Fe 2O3 added showed the highest Jc of 7890 A/cm2 at 77 K and in self-field after the first intermediate rolling. These results suggest that intermediate rolling and magnetic nanopowders can be used to improve the critical current density of multifilament Ag/Bi-Sr-Ca-Cu-O superconductor tapes.

AB - The transport critical current density of multifilament Ag/Bi-Sr-Ca-Cu-O tapes with the addition of magnetic nanopowder (γ-Fe2O 3) has been measured. The tapes were prepared using the powder in tube method with 30 filaments. Three types of Bi-Sr-Ca-Cu-O starting materials namely from solid state reaction without γ-Fe2O3, solid state reaction with γ-Fe2O3 addition and ultrafine powders prepared by coprecipitation method with γ-Fe 2O3 have been used. The starting composition of the γ-Fe2O3 added samples is Bi1.6Pb 0.4Sr2Ca2Cu3O10-(γ- Fe2O3)0.01. The first intermediate rolling enhances Jc but subsequent rolling shows no improvement in J c. Tapes prepared from coprecipitation powders with γ-Fe 2O3 added showed the highest Jc of 7890 A/cm2 at 77 K and in self-field after the first intermediate rolling. These results suggest that intermediate rolling and magnetic nanopowders can be used to improve the critical current density of multifilament Ag/Bi-Sr-Ca-Cu-O superconductor tapes.

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