Enhancing the effective critical current density in a Nb superconducting thin film by cooling in an inhomogeneous magnetic field

Autor:	Chaves, D. A. D., de Araújo, I. M., Carmo, D., Colauto, F., de Oliveira, A. A. M., de Andrade, A. M. H., Johansen, T. H., Silhanek, A. V., Ortiz, W. A., Motta, M.
Rok vydání:	2021
Předmět:	Condensed Matter - Superconductivity
Druh dokumentu:	Working Paper
DOI:	10.1063/5.0058680
Popis:	Quantitative magneto-optical imaging of a type-II superconductor thin film cooled under zero, homogeneous, and inhomogeneous applied magnetic fields, indicates that the latter procedure leads to an enhancement of the screening capacity. Such an observation is corroborated by both B-independent and B-dependent critical state model analyses. Furthermore, repulsive (attractive) vortex-(anti)vortex interactions were found to have a decisive role in the shielding ability, with initial states prepared with vortices resulting in a shorter magnetic flux front penetration depth than those prepared with antivortices. The proposed strategy could be implemented to boost the performance of thin superconducting devices. Comment: 6 pages and 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2106.01934 Zobrazit plný text záznamu View this record from Arxiv