Kinetics of Flux Jumps in Type-II Superconductors

Critical state stability in type-II superconductors and superconducting-normal-metal composites

“…, 1964;Goedemoed et al , 1965;Borovik et g/. , 1965;Neuringer and Shapira, 1966;Harrison et al , 1973Harrison et al , , 1975Onishi, 1974). Depending on sample properties, cladding, and environmental conditions, the mea, sured value lies in the range of from 10 to 10 4 s; this order of magnitude is in agreement with the theoretical estimate of t, It should be stressed, however, that t&' is the increment of the initial increase in instability.…”

EMP Effects on High-<tex>$T _c$</tex>Superconducting Devices

“…The shape of these regions and the damage process dynamics makes it possible to conclude that they appear as a result of thermomagnetic instability [13] induced by fast magnetic flux jumps at the edge of the film. Such instability is typical for hard type II superconductors exposed to alternating magnetic fields [14].…”

Nucleation and growth of a flux instability in superconductingYBa2Cu3Leiderer1, Boneberg2, Brüll3 et al. 1993Phys. Rev. Lett.180121532View full textAdd to dashboardCite

“…The motion of flux lines in these materials depends crucially on the presence of pinning centers, which lead to flux gradients inside the superconductors as described, e.g., by the Bean model. Since these field distributions do not correspond to an equilibrium distribution of the flux line lattice, the system can eventually become unstable, and flux enters the sample in momentary events in the form of "flux jumps" [3,4]. For massive samples on a millimeter scale the characteristic time for the redistribution of flux following such an instability has been found to be in the range of milliseconds [4].…”