Magnetically induced signatures in a thin film superconductor

TL;DR

This paper investigates how magnetic nanostructures influence thin film superconductors, revealing characteristic magnetic signatures and the ability to induce weak links, with implications for superconducting device design.

Contribution

It introduces a detailed analysis of magnetic field signatures and weak link induction in thin film superconductors caused by magnetic nanostructures, expanding understanding of superconductor-magnet interactions.

Findings

Magnetic distributions produce distinct magnetic field signatures.

Magnetic structures can induce weak links in superconductors.

A general expression for energy within the London model is discussed.

Abstract

We study the interaction between a one dimensional magnetic nanostructure and a thin film superconductor. It is shown that different magnetic distributions produce characteristic magnetic field signatures. Moreover, the magnetic structure can induce a weak link in the superconducting film, or be positioned directly above a predefined nonsuperconducting weak link. We estimate the magnetic flux associated with such a structure, and discuss a general expression for the energy calculated within the London model.