Simulation results were presented which showed that twin boundaries acted as an easy-flow channel for vortex motion parallel to the twin boundaries, and as obstructive barriers to motion normal to the twin boundaries; as observed experimentally. When the Lorentz force was oriented at an intermediate angle with respect to the twin plane, guided motion of the vortices occurred.

Twin Boundary Effects on Vortex Dynamics. R.Yuhara, Y.Enomoto: AIP Conference Proceedings, 1999, 469, 697-8