A New Direct Magnetic Method for Determining ${\rm J}_{\rm C}$ in Bulk Superconductors From Magnetic Field Diffusion Measurements

@article{Douine2012AND,
  title={A New Direct Magnetic Method for Determining \$\{\rm J\}_\{\rm C\}\$ in Bulk Superconductors From Magnetic Field Diffusion Measurements},
  author={Bruno Douine and Frex0301dex0301ric Sirois and Jean Leveque and Kx00E9vin Berger and Charles Henri Bonnard and Truc Hoang and Smail Mezani},
  journal={IEEE Transactions on Applied Superconductivity},
  year={2012},
  volume={22},
  pages={9001604-9001604}
}
The knowing the critical current density J<sub>C</sub> is important to calculate AC losses in superconducting applications. Usually can be obtained from magnetization measurements or electric measurements based on global quantities as the magnetic flux or the voltage. In this paper a quick and direct magnetic method for determining J<sub>C</sub> is proposed. It is based on direct measurements of local magnetic field in the gap between two bulk HTS pellets. Field penetration measurements were… CONTINUE READING