DYNAMICALLY INDUCED DISORDER IN THE VORTEX LATTICE OF 2H-NBSE2

We report on combined transport and magnetic decoration studies of pin ned and moving vortex structures in the low-field (<100 Oe) regime. Th ermal and current annealing processes show that the pinned equilibrium state of the vortex array has fewer topological defects than that obs erved when the structure first starts to become unpinned, and more def ects than observed at high vortex velocities. This is in agreement wit h recent experiments and theoretical results.