Symmetry of the remanent-state flux distribution in superconducting thin strips: Probing the critical state
A. V. Bobyl, D. V. Shantsev, Y. M. Galperin, T. H. Johansen
DOI 10.1103/PhysRevB.63.184510 · Physical Review B
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Abstract
The critical-state in a thin strip of YBa2Cu3O7−δ is studied by magneto-optical imaging. The distribution of magnetic flux density is shown to have a specific symmetry in the remanent state after a large applied field. The symmetry was predicted [Phys. Rev. Lett. 82, 2947 (1999)] for any jc(B), and is therefore suggested as a simple tool to verify the applicability of the critical-state model. At large temperatures we find deviations from this symmetry, which demonstrates a departure from the critical-state behavior. The observed deviations can be attributed to an explicit coordinate dependence of jc since both a surface barrier and flux creep would break the symmetry in a different way.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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