Effects of edge cracks on the thermomagnetic instabilities of type-II superconducting thin films.

ABSTRACT: Thermomagnetic instability is a crucial issue for the application of superconductors. Effects of edge cracks on the thermomagnetic instability of superconducting thin films are systematically investigated in this work. Dendritic flux avalanches in thin films are well reproduced through electrodynamics simulations, and relevant physical mechanisms are revealed from dissipative vortex dynamics simulations. It is found that edge cracks sharply decrease the threshold field for the thermomagnetic instability of superconducting films. Spectrum analysis shows that the time series of magnetization jumping displays scale-invariance and follows a power law with an exponent around 1.9. In a cracked film, flux jumps more frequently with lower amplitudes compared with its crack-less counterpart. As the

SUBMITTER: Jing Z 

PROVIDER: S-EPMC10062698 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature