Self-organization of vortices in type-II superconductors during magnetic relaxation
R. Prozorov, D. Giller
TL;DR
This paper revises the application of self-organized criticality theory to magnetic relaxation in type-II superconductors, highlighting the role of energy barriers and predicting time-varying magnetic noise spectra.
Contribution
It introduces a new perspective on vortex self-organization by emphasizing energy barriers over current density and predicts dynamic changes in magnetic noise spectra.
Findings
Energy barrier drives vortex self-organization
Magnetic noise spectrum varies with time during relaxation
Revised SOC applicability to superconductors
Abstract
We revise the applicability of the theory of self-organized criticality (SOC) to the process of magnetic relaxation in type-II superconductors. The driving parameter of self-organization of vortices is the energy barrier for flux creep and not the current density. The power spectrum of the magnetic noise due to vortex avalanches is calculated and is predicted to vary with time during relaxation.
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