  The article provides a brief overview of existing models describing guided
flux motion. The first model was proposed by Niessen et al. This model works in
the single-vortex approximation and provides qualitative explanation of the
effect, but in most cases it gives an overestimated guiding angle. The
stochastic model explains the experimentally observed effect of decreasing the
guiding angle, the so-called slipping effect, by the influence of thermal
fluctuations. However, the performed estimates show that thermal fluctuations
should not be so significant. An alternative guiding model is the anisotropic
pinning model. This model works in the critical state approximation, and the
slipping effect is the result of the combined action of anisotropic pinning and
vortex interaction. The predictions of all three models are verified by the
example of a superconducting Nb-Ti tape containing about 6 vol. % {/alpha}-Ti,
which acts as strong pinning centers. Cutting samples at different angles to
rolling allows one to control the direction of the driving force. It was found
that when the standard criterion of the electric field is reached, the guiding
angle varies significantly at different places along the sample, which is
explained by the plastic mode of the vortex matter motion. In this case, the
anisotropic pinning model semi-quantitatively predicts the direction angle
averaged over the sample length. With an increase in the driving force, the
vortex matter motion passes into an elastic mode, and the guiding angle becomes
uniform along the sample.
