Jc anisotropy and pinning behaviors of the in-situ MgB 2 wires with/without SiC addition

Hideyuki Kuwashima, Satoru Murase, Nozomu Nanato, Seok Beom Kim, Yutaka Yamada, Akio Nitta, Kyoji Tachikawa

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In an attempt to understand the effects of SiC addition on the pinning behavior for the in-situ PIT MgB2 tape wire, field and temperature dependencies on critical current density, Jc and the pinning force were studied by considering applied magnetic field direction for the rectangular-shaped wire. As a result, it was clarified that the SiC-doped wire has the equiaxial pinning center and the un-doped wire has the inequi-axial pining center. Taking the pinning scaling law into account, it is found that the SiC-doped MgB2 wire has two kinds of the pinning center and the dominant pinning center changes with temperature, that is, the pinning centers are the grain boundary and the precipitates at high and low temperatures, respectively. The un-doped MgB2 wire is assumed to have anisotropy of the pinning mechanism.

Original languageEnglish
Article number4493377
Pages (from-to)1212-1215
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume18
Issue number2
DOIs
Publication statusPublished - Jun 1 2008

Keywords

  • High-temperature superconductors
  • MgB
  • Pinning
  • Superconducting filaments and wires

ASJC Scopus subject areas

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

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