Classical analogy for the deflection of flux avalanches by a metallic layer

TL;DR

This paper introduces a classical model explaining how a conductive layer influences magnetic flux avalanches in superconductors, highlighting magnetic braking as a key mechanism for avalanche deflection and exclusion.

Contribution

It presents a simple classical analogy model using a magnetic monopole to explain flux avalanche deflections caused by a conductive layer.

Findings

Flux avalanches are deflected by conductive layers.

In some cases, flux is completely excluded from the conductive area.

Magnetic braking is identified as a key mechanism in avalanche behavior.

Abstract

Sudden avalanches of magnetic flux bursting into a superconducting sample undergo deflections of their trajectories when encountering a conductive layer deposited on top of the superconductor. Remarkably, in some cases flux is totally excluded from the area covered by the conductive layer. We present a simple classical model that accounts for this behaviour and considers a magnetic monopole approaching a semi-infinite conductive plane. This model suggests that magnetic braking is an important mechanism responsible for avalanche deflection.