Bi-Pb-Sr-Ca-Cu-0 superconductors were prepared by the laser pedestal growth method. The high Tc phase was created only by post annealing. As the growing speed increased, the annealing time necessary to obtain a Tc above 100K decreased. When the low Tc phase was aligned with the growing direction, Tc was under 100K, but a Jc of 15B0A/cm2(77.3K, OT) was obtained. In this case, magnetic field dependence below 300 gauss was superior to that of Pb-free materials.
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Hayashi, K., Nonoyama, H., Ueyama, M. et al. Preparation of Bipbsrcacuo Superconductors by Laser Pedestal Growth Method. MRS Online Proceedings Library 169, 309–312 (1989). https://doi.org/10.1557/PROC-169-309