Analytical model of the response of a superconducting film to line currents
Yasunori Mawatari, John R. Clem
DOI 10.1103/PhysRevB.74.144523 · Physical Review B
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Abstract
We theoretically investigate the response of a superconducting film to line currents flowing in linear wires placed above the film, and we present analytic expressions for the magnetic-field and current distributions based on the critical state model. The behavior of the superconducting film is characterized by the sheet-current density Kz, whose magnitude cannot exceed the critical value jcd, where jc is the critical current density and d is the thickness of the film. When the transport current I0 flowing in the wire is small enough, ∣Kz∣ is smaller than jcd and the magnetic field is shielded below the film. When I0 exceeds a threshold value Ic0∝jcd, on the other hand, ∣Kz∣ reaches jcd and the magnetic field penetrates below the film. We also calculate the ac response of the film when an ac transport current flows in the linear wires.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-y 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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