Flux Penetration in Superconducting Strip with Edge-Indentation

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, $\Delta$, can be significantly ($\sim$ 50%) larger than the indentation radius $r_0$, in contrast to a bulk supercondutor in the critical state where $\Delta =r_0$. It is also shown that the flux creep tends to smoothen the flux front, i.e. reduce $\Delta$. The results are in very good agreement with magneto-optical studies of flux penetration into an YBa${}_2$Cu${}_3$O${}_x$ film having an edge defect.

5 pages, 7 figures

References in corpus (5)

• Onset of dendritic flux avalanches in superconducting films
• Thin superconductors and SQUIDs in perpendicular magnetic field
• Size of flux jumps in superconducting films
• Collapse of the critical state in superconducting niobium
• Magneto-optical imaging of magnetic flux patterns in superconducting films with antidots

Cited by in corpus (6)

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• Mechanism for flux guidance by micrometric antidot arrays in superconducting films
• Electric field formulation for thin film magnetization problems
• Transport current and magnetization problems for thin type-II superconducting films
• Impact of border defects on the magnetic flux penetration in superconducting films