Evaluation by numerical analysis of magnetic shielding characteristics of bulk high-Tc superconductor containing weak links

Katsuhiro Fukuoka; Mitsuo Hashimoto; Masaru Tomita; Masato Murakami

doi:10.1002/eej.10209

Evaluation by numerical analysis of magnetic shielding characteristics of bulk high-T_c superconductor containing weak links

Katsuhiro Fukuoka, Mitsuo Hashimoto, Masaru Tomita, Masato Murakami

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

Abstract

High-T_c superconductors (HTS), which have the characteristics of critical current density over 3 × 10⁴ A/cm² at liquid nitrogen temperature (77 K) and 1 T, can be produced. Thus, they are promising for many practical applications such as a magnetic bearing, magnetic levitation, flywheel, and magnetic shielding. Since the HTS characteristics are not homogeneous in some specimens due to grain boundaries and cracks, the distribution of magnetic characteristics should be assessed. Thus, we have measured the distribution of the magnetic flux density on the surface of the HTS using a Hall element, and have evaluated its magnetic characteristics. The measurement of magnetic characteristics using a Hall element is difficult regarding the distribution of the magnetic flux density on the actual surface and inside of the HTS sample. In this research, we conducted a quantitative evaluation of the magnetic shielding characteristics of the HTS including weak links under a static magnetic field with the three-dimensional finite element method analysis.

Original language	English
Pages (from-to)	9-17
Number of pages	9
Journal	Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Volume	146
Issue number	1
DOIs	https://doi.org/10.1002/eej.10209
Publication status	Published - 2004 Jan 15
Externally published	Yes

Keywords

Finite element method
Magnetic characteristics
Magnetic field analysis
Weak link
YBCO bulk superconductor

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1002/eej.10209

Cite this

Evaluation by numerical analysis of magnetic shielding characteristics of bulk high-T_c superconductor containing weak links. / Fukuoka, Katsuhiro; Hashimoto, Mitsuo; Tomita, Masaru et al.
In: Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi), Vol. 146, No. 1, 15.01.2004, p. 9-17.

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

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AB - High-Tc superconductors (HTS), which have the characteristics of critical current density over 3 × 104 A/cm2 at liquid nitrogen temperature (77 K) and 1 T, can be produced. Thus, they are promising for many practical applications such as a magnetic bearing, magnetic levitation, flywheel, and magnetic shielding. Since the HTS characteristics are not homogeneous in some specimens due to grain boundaries and cracks, the distribution of magnetic characteristics should be assessed. Thus, we have measured the distribution of the magnetic flux density on the surface of the HTS using a Hall element, and have evaluated its magnetic characteristics. The measurement of magnetic characteristics using a Hall element is difficult regarding the distribution of the magnetic flux density on the actual surface and inside of the HTS sample. In this research, we conducted a quantitative evaluation of the magnetic shielding characteristics of the HTS including weak links under a static magnetic field with the three-dimensional finite element method analysis.

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