Flux penetration in a superconducting strip with an edge indentation

J. I. Vestgården; D. V. Shantsev; Y. M. Galperin; T. H. Johansen

doi:10.1103/PhysRevB.76.174509

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Flux penetration in a superconducting strip with an edge indentation

J. I. Vestgården, D. V. Shantsev, Y. M. Galperin, T. H. Johansen

DOI 10.1103/PhysRevB.76.174509 · Physical Review B

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Abstract

The flux penetration near a semicircular indentation at the edge of a thin superconducting strip placed in a transverse magnetic field is investigated. The flux front distortion due to the indentation is calculated numerically by solving the Maxwell equations with a highly nonlinear E(j) law. We find that the excess penetration Δ can be significantly (∼50%) larger than the indentation radius r0, in contrast to a bulk superconductor in the critical state where Δ=r0. It is also shown that the flux creep tends to smoothen the flux front, i.e., reduce Δ. The results are in very good agreement with magneto-optical studies of flux penetration into an YBa2Cu3Ox film having an edge defect.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown