Since bulk high Tc 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 the 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 pick up 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 the HTS under various external magnetic field strength are estimated by analysis and experiment results. Moreover, the heat generation of the superconductor is considered.
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