Pinning strength in Ag-sheathed Bi(Pb)-Sr-Ca-Cu-O superconductor tapes studied from current-electric field characteristics

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Abstract

The relationship between the exponent n of the power law in the current-electric field (I-E ) curve and pinning properties of Ag-sheathed Bi(Pb)-Sr-Ca-Cu-O tapes prepared by three different thermo-mechanical treatments was investigated. Two methods are used to determine the pinning strength of the tapes. The first method is comparing the rate of decrease of the transport current density (Jc). The second method is comparing the peak of the pinning force density of the tapes. It was found that for the same sample, the rate of decrease of n in applied fields shows a similar profile with the rate of decrease of the tapes' pinning strength. Hence, the n value which can be obtained directly from the I-E curve, can be used as an alternative method to study the pinning properties of superconductor.

Original languageEnglish
Pages (from-to)17-19
Number of pages3
JournalJournal of Materials Science: Materials in Electronics
Volume16
Issue number1
DOIs
Publication statusPublished - Jan 2005

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BSCCO superconductors
Tapes
tapes
Superconducting materials
Electric fields
electric fields
Thermomechanical treatment
thermomechanical treatment
curves
Current density
exponents
current density
profiles

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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abstract = "The relationship between the exponent n of the power law in the current-electric field (I-E ) curve and pinning properties of Ag-sheathed Bi(Pb)-Sr-Ca-Cu-O tapes prepared by three different thermo-mechanical treatments was investigated. Two methods are used to determine the pinning strength of the tapes. The first method is comparing the rate of decrease of the transport current density (Jc). The second method is comparing the peak of the pinning force density of the tapes. It was found that for the same sample, the rate of decrease of n in applied fields shows a similar profile with the rate of decrease of the tapes' pinning strength. Hence, the n value which can be obtained directly from the I-E curve, can be used as an alternative method to study the pinning properties of superconductor.",
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AB - The relationship between the exponent n of the power law in the current-electric field (I-E ) curve and pinning properties of Ag-sheathed Bi(Pb)-Sr-Ca-Cu-O tapes prepared by three different thermo-mechanical treatments was investigated. Two methods are used to determine the pinning strength of the tapes. The first method is comparing the rate of decrease of the transport current density (Jc). The second method is comparing the peak of the pinning force density of the tapes. It was found that for the same sample, the rate of decrease of n in applied fields shows a similar profile with the rate of decrease of the tapes' pinning strength. Hence, the n value which can be obtained directly from the I-E curve, can be used as an alternative method to study the pinning properties of superconductor.

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