Abstract
High-Tc superconductors (HTS), which have a characteristic of the critical current density over 3×104 A/cm2 in liquid nitrogen temperature (77K) and 1T, can be produced. Thus, they are promising for many practical applications such as a magnetic bearing, a magnetic levitation, a flywheel, a magnetic shielding and etc.. 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 for measuring the distribution of the magnetic flux density on the actual surface and the inside of the HTS sample. In this research, we examined a quantitative evaluation of the magnetic shielding characteristics of the HTS including weak links under the static magnetic field with the three-dimensional finite element method analysis.
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