FLUX-LINE DYNAMICS UNDER A TRANSPORT CURRENT

A recently proposed computational model for the dynamics of magnetic flux lines in type-II superconductors is applied to the case where a transport current is present. The dynamics for interacting flux lines in random media is expressed in terms of a Langevin-type stochastic equation. By changing the strength of both transport current and pinning as well as the temperature, we simulate the qualitative dynamical behavior of the flux lines. In particular, we study the relationship between the transport current and the induced flux velocity.