The break of shielding current at pulsed field magnetization of   superconducting annuli
  The superconducting current breaking effect at pulsed field magnetization of HTS annuli was carefully investigated. It is proposed the simple model for qualitative description of this process. In particular, it is shown the appearance of a narrow sector of the considerable heating through which the magnetic flux penetrates into the superconducting annuli. 
V. S. Korotkov, E. P. Krasnoperov, A. A. Kartamyshev
cond-mat.supr-con