E-J characteristics and n value of melt-textured REBa2Cu3Ox; (RE: Nd, Y)

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3 Citations (Scopus)

Abstract

Melt-textured NdBa2Cu3Ox, (Ndl23) exhibits the secondary peak effect on the magnetic field dependence of the critical current density (Jc), which is attributed to the field-induced pinning. The electric field (E)-the current density (J) characteristics will be affected by the field-induced pinning. With the aim of clarifying this effect, we have investigated the E-J characteristics for melt-textured Nd123 with the secondary peak and Yba2Cu3Ox (Y123) with smaller secondary peak through dc magnetization and ac susceptibility. The n value was estimated on the assumption that E follows the power law: E = Ec(J/Jc)n. The n value was about 30 at 77 K for Y123. In the case of Nd123, the peak structure was observed on the magnetic field dependence of the n value, which exceeded 60 at 77 K. This suggests that the n value is increased by the field-induced pinning.

Original languageEnglish
Pages (from-to)3109-3112
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume13
Issue number2 III
DOIs
Publication statusPublished - 2003 Jun 1
Event2002 Applied Superconductivity Conference - Houston, TX, United States
Duration: 2002 Aug 42002 Aug 9

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Keywords

  • E-J characteristics
  • Field-induced pinning
  • N value
  • Nd123
  • Secondary peak

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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