Abstract
AC magnetic properties of bulk high-temperature superconductor were evaluated with three-dimensional finite element method (FEM) analyses. When an external magnetic field strength increased, the heat was generated in weak link parts and the critical current density decreased greatly in these parts. The critical current densities in the weak link parts were estimated by experimental and analytical results under various external magnetic field strengths. The relation among the external magnetic field strength, the critical current density, and the heat generation were evaluated overall.
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