Magneto-optical investigation of flux penetration in a superconducting ring
Myriam Pannetier, F. C. Klaassen, R. J. Wijngaarden, M. Welling, K. Heeck, J. M. Huijbregtse, B. Dam, R. Griessen
DOI 10.1103/PhysRevB.64.144505 · Physical Review B
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Abstract
Using advanced magneto-optics, the field and current distributions in superconducting thin film YBa2Cu3O7 rings in an externally applied magnetic field are studied experimentally. The observations are in close agreement with numerical calculations. During the initial flux penetration and field reversal a highly nonuniform current distribution is observed. In particular, concentric counterrotating current loops occur during field reversal. We explore implications of these results for the determination of critical currents and penetration fields from bulk magnetization measurements.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure unresolved | unknown |
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