Vortex Plastic Motion in Twinned Superconductors.

We present simulations, without electrodynamical assumptions, of Bsx, y, Hstdd, MsHstdd, and JcsHstdd in hard superconductors for a variety of twin-boundary pinning potential parameters, and for a range of values of the density and strength of the pinning sites. We numerically solve the overdamped equations of motion of up to 10 flux-gradient-driven vortices which can be temporarily trapped at ,106 pinning centers. These simulations relate macroscopic measurements [e.g., MsHd, “flame” shaped Bsx, yd profiles] with the underlying microscopic pinning landscape and the plastic dynamics of individual vortices. [S0031-9007(96)01363-4]