Magneto-optical imaging of magnetic flux patterns in superconducting films with antidots

TL;DR

This study uses magneto-optical imaging to visualize and analyze how antidot patterns in superconducting films influence magnetic flux behavior, revealing controlled flux guidance and dynamic properties.

Contribution

It introduces a novel approach to visualize flux dynamics in superconducting films with antidots and demonstrates controlled flux manipulation using specific antidot arrangements.

Findings

Antidot arrays facilitate magnetic flux propagation.

Flux direction can be controlled via antidot patterning.

High-resolution imaging enables detailed flux analysis.

Abstract

Superconducting YBaCuO thin films were equipped with a special arrangement of antidots (holes) of 1 micron radius in order to guide the stream of magnetic flux moving in (or out of) the sample. The flux distribution and its dynamics were visualized using real-time magneto-optical imaging. It is clearly demonstrated that one-dimensional antidot arrays strongly facilitate propagation of magnetic flux. We also demonstrate a possibility to alter the direction of flux motion in a controlled way by special arrangement of intercepting antidot arrays. Our resolution was sufficient for observation of flux in particular antidots, which allows a more detailed dynamic analysis of such systems.