Flux pinning and critical current density in YBa2Cu3O6+y and EuBa2Cu3O6+y superconductors
Gang Xiao, F. H. Streitz, A. Gavrin, M. Z. Cieplak, J. Childress, Ming Lu, A. Zwicker, C. L. Chien
DOI 10.1103/PhysRevB.36.2382 · Physical Review B
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Abstract
We have studied the magnetic characteristics of the critical states of Y-Ba-Cu-O and Eu-Ba-Cu-O high-Tc superconductors. Magnetization data at various temperatures have revealed a very large magnetic hysteresis. The highly irreversible behavior was found to exist both in bulk samples and in well-isolated particles. These effects are consistent with the existence of large pinning forces caused by the structural defects in these materials. By analyzing the hysteretic magnetization data, the critical current density Jc as a function of the external magnetic field has been obtained at several temperatures. The variation of the trapped flux with temperature (up to Tc) has also been measured.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O6+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 94.5 | Pressure not reported | midpoint |
| EuBa2Cu3O6+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 94 | Pressure not reported | midpoint |
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