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AC magnetic characteristics of bulk high‐ T c superconductor with numerical analysis and evaluation of exothermic phenomenon
Author(s) -
Fukuoka Katsuhiro,
Hashimoto Mitsuo
Publication year - 2005
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.20134
Subject(s) - magnetic field , materials science , condensed matter physics , superconductivity , finite element method , magnetic flux , physics , thermodynamics , quantum mechanics
Since bulk high‐ T c superconductor (HTS) characteristics are not homogeneous in some specimens due to grain boundaries and cracks, magnetic characteristics should be assessed under the static and AC magnetic field. Thus, static magnetic characteristics of HTS have been evaluated by measurements of the magnetic flux density on the specimen surface using a Hall element and numerical analyses using a finite element method. AC magnetic characteristics have been experimentally evaluated by measurements of the magnetic field using a Hall element and pickup coils. In this research, AC magnetic characteristics of HTS are evaluated by numerical analyses using a three‐dimensional finite element method. Critical current densities of HTS under various external magnetic field strength are estimated by analysis and experiment results. Moreover, the heat generation of the superconductor is considered. © 2005 Wiley Periodicals, Inc. Electr Eng Jpn, 152(4): 1–7, 2005; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20134