Critical Currents of Tl2Ba2Ca2Cu3Oz Bulk Superconductors |
| M. Giebułtowski, W. Woch, R. Zalecki, M. Kowalik, J. Niewolski, Ł. Gondek
AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Solid State Physics Department, Cracow, Poland |
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| The critical temperatures and the critical currents of Tl2Ba2Ca2Cu3Oz (Tl-2223) bulk superconductor have been studied using ac susceptibility measurements before and after the oxygenation process. With oxygenation the critical temperature increased from 114.2 K to 118.8 K and the critical current at 77 K raised from 56 A/cm2 to 230 A/cm2. The Ginzburg-Landau strong coupling limit approach was applied to describe the temperature dependence of the critical current densities. |
DOI:10.12693/APhysPolA.135.24 topics: thallium cuprate, oxygenation, critical current |