Thermomagnetic instability of standing flux-antiflux front in layered type-II superconductors

TL;DR

This paper investigates the stability of flux-antiflux fronts in layered superconductors, identifying mechanisms of destabilization due to anisotropy and heat, and predicting conditions leading to instability.

Contribution

It introduces a model analyzing how anisotropy and vortex heating affect flux-antiflux front stability in layered superconductors.

Findings

Small vortex-antivortex heating can cause front instability

Conditions for stability depend on anisotropy and heating parameters

Estimated size of unstable patterns

Abstract

Stability of standing flux-antiflux front in anisotropic layered superconductors is considered. We describe two assisting mechanisms destabilizing the standing vortex-antivortex front. There are anisotropy of the layered superconductors and the heat, released by the vortex dynamics. We present the conditions of the front stability for various anisotropy and heating parameters. We predict that even small vortex-antivortex heating can result in front instability. The characteristic size of the unstable pattern is estimated.