Moving of vortices in type II superconductors leads to energy dissipation, and therefore pinning of them is a

significant problem. Determination of pinning potential and pinning mechanism from experimental data of...

The flux pinning mechanisms of nano-Si-doped MgB2 are reported in this work. The field

dependence of the critical current density, Jc(B), was analyzed within the collective pinning

model. We found that the mechanisms for both δl...

, and the irreversibility field, Hirr, has been obtained by the Kramer method. The pinning mechanism of the co-doped sample with 2% Al and 5% SiC was investigated in particular due to its having the highest Hirr. The normalized volume pinning force f = F/Fmax as a function...