Magnetic microscopy for characterization of local critical current in iron-sheathed MgB2 wires

K. Higashikawa, A. Yamamoto, T. Kiss, S. Ye, A. Matsumoto, H. Kumakura

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We have developed a characterization method of local critical current in iron-sheathed MgB2 wires. Local homogeneity was visualized by the scanning Hall-probe microscopy (SHPM). The value of local critical current was quantified with the aid of the finite element method (FEM) considering the ferromagnetic properties of the iron sheath. The results suggested that MgB 2 wires fabricated by internal Mg diffusion processes still have large longitudinal inhomogeneity and much higher potential than that estimated by the four-probe transport method. This will be very important information for making a correct strategy for further development of MgB2 wires.

Original languageEnglish
Pages (from-to)62-64
Number of pages3
JournalPhysica C: Superconductivity and its applications
Volume504
DOIs
Publication statusPublished - 2014 Sep 15
Externally publishedYes

Keywords

  • Critical current
  • Local homogeneity
  • Scanning Hall-probe microscopy

ASJC Scopus subject areas

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

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