MO observation of flux penetration into high-Tc superconductors with grain boundaries

N. Chikumoto; K. Furusawa; M. Murakami; S. Tajima

doi:10.1016/j.physc.2004.01.121

MO observation of flux penetration into high-T_c superconductors with grain boundaries

N. Chikumoto, K. Furusawa, M. Murakami, S. Tajima

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Effect of grain boundaries on the magnetic field distributions in YBCO was studied by use of magneto-optical (MO) imaging technique. The grain boundary was artificially introduced with a multi-seeded melt-growth process. The current distribution in the sample was obtained from the MO image using an inversion scheme based on the inverse-matrix method. With this technique, we could obtain intergranular and intragranular critical current densities. Large depression of the intergranular critical current was observed in the sample with large misorientation angles.

Original language	English
Pages (from-to)	1005-1010
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	412-414
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physc.2004.01.121
Publication status	Published - 2004 Oct

Keywords

Critical current density
Grain boundary
Magneto-optical imaging
Y123

ASJC Scopus subject areas

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

Access to Document

10.1016/j.physc.2004.01.121

Cite this

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title = "MO observation of flux penetration into high-Tc superconductors with grain boundaries",

abstract = "Effect of grain boundaries on the magnetic field distributions in YBCO was studied by use of magneto-optical (MO) imaging technique. The grain boundary was artificially introduced with a multi-seeded melt-growth process. The current distribution in the sample was obtained from the MO image using an inversion scheme based on the inverse-matrix method. With this technique, we could obtain intergranular and intragranular critical current densities. Large depression of the intergranular critical current was observed in the sample with large misorientation angles.",

keywords = "Critical current density, Grain boundary, Magneto-optical imaging, Y123",

author = "N. Chikumoto and K. Furusawa and M. Murakami and S. Tajima",

note = "Funding Information: This work was supported by the New Energy and Industrial Technology Department Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.",

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T1 - MO observation of flux penetration into high-Tc superconductors with grain boundaries

AU - Chikumoto, N.

AU - Furusawa, K.

AU - Murakami, M.

AU - Tajima, S.

N1 - Funding Information: This work was supported by the New Energy and Industrial Technology Department Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications.

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AB - Effect of grain boundaries on the magnetic field distributions in YBCO was studied by use of magneto-optical (MO) imaging technique. The grain boundary was artificially introduced with a multi-seeded melt-growth process. The current distribution in the sample was obtained from the MO image using an inversion scheme based on the inverse-matrix method. With this technique, we could obtain intergranular and intragranular critical current densities. Large depression of the intergranular critical current was observed in the sample with large misorientation angles.

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KW - Grain boundary

KW - Magneto-optical imaging

KW - Y123

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