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 journalArticle

4 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 - Sep 15 2014

Fingerprint

Critical currents
critical current
Microscopic examination
Iron
wire
Wire
microscopy
iron
probes
sheaths
homogeneity
finite element method
inhomogeneity
Scanning
Finite element method
scanning

All Science Journal Classification (ASJC) codes

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

Cite this

Magnetic microscopy for characterization of local critical current in iron-sheathed MgB2 wires. / Higashikawa, K.; Yamamoto, A.; Kiss, T.; Ye, S.; Matsumoto, A.; Kumakura, H.

In: Physica C: Superconductivity and its applications, Vol. 504, 15.09.2014, p. 62-64.

Research output: Contribution to journalArticle

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AU - Ye, S.

AU - Matsumoto, A.

AU - Kumakura, H.

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AB - 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.

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