Flux Distribution in Superconducting Films with Holes

TL;DR

This paper presents a simulation study of flux penetration in superconducting films with holes, introducing a new method for modeling holes and analyzing flux distribution and current density effects.

Contribution

A novel simulation method for incorporating holes in superconducting films and analyzing their impact on flux and current distribution.

Findings

Current density is compressed near holes, increasing flux traffic.

Flux density is slightly reduced between the hole and the edge.

Simulation results agree with experimental magneto-optical studies.

Abstract

Flux penetration into type-II superconducing films is simulated for transverse applied magnetic field and flux creep dynamics. The films contain macroscopic, non-conducting holes and we suggest a new method to introduce the holes in the simulation formalism. The method implies reconstruction of the magnetic field change inside the hole. We find that in the region between the hole and the edge the current density is compressed so that the flux density is slightly reduced, but the traffic of flux is significantly increased. The results are in good agreement with magneto-optical studies of flux distributions in YBCO films.