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

doi:10.1016/j.physc.2014.04.009

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 journal › Article › peer-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 language	English
Pages (from-to)	62-64
Number of pages	3
Journal	Physica C: Superconductivity and its applications
Volume	504
DOIs	https://doi.org/10.1016/j.physc.2014.04.009
Publication status	Published - 2014 Sep 15
Externally published	Yes

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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Cite this

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title = "Magnetic microscopy for characterization of local critical current in iron-sheathed MgB2 wires",

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.",

keywords = "Critical current, Local homogeneity, Scanning Hall-probe microscopy",

author = "K. Higashikawa and A. Yamamoto and T. Kiss and S. Ye and A. Matsumoto and H. Kumakura",

note = "Funding Information: This work was supported by Japan Science and Technology Agency (JST) as Advanced Low Carbon Technology Research and Development Program (ALCA).",

year = "2014",

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doi = "10.1016/j.physc.2014.04.009",

language = "English",

volume = "504",

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journal = "Physica C: Superconductivity and its Applications",

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TY - JOUR

T1 - Magnetic microscopy for characterization of local critical current in iron-sheathed MgB2 wires

AU - Higashikawa, K.

AU - Yamamoto, A.

AU - Kiss, T.

AU - Ye, S.

AU - Matsumoto, A.

AU - Kumakura, H.

N1 - Funding Information: This work was supported by Japan Science and Technology Agency (JST) as Advanced Low Carbon Technology Research and Development Program (ALCA).

PY - 2014/9/15

Y1 - 2014/9/15

N2 - 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.

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.

KW - Critical current

KW - Local homogeneity

KW - Scanning Hall-probe microscopy

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