Magnetic remanence of Josephson junction arrays

TL;DR

This paper investigates the magnetic remanence in Josephson junction arrays caused by AC magnetic fields, demonstrating its dependence on temperature and critical current distribution, with potential for array characterization.

Contribution

It provides experimental validation of magnetic remanence in disordered Josephson arrays and links it to critical current distribution, expanding understanding of their magnetic properties.

Findings

Magnetic remanence observed in 3D disordered arrays

Remanence depends on temperature and critical current distribution

Method proposed to determine critical current distribution from remanence

Abstract

In this work we study the magnetic remanence exhibited by Josephson junction arrays in response to an excitation with an AC magnetic field. The effect, predicted by numerical simulations to occur in a range of temperatures, is clearly seen in our tridimensional disordered arrays. We also discuss the influence of the critical current distribution on the temperature interval within which the array develops a magnetic remanence. This effect can be used to determine the critical current distribution of an array.