Angle-resolved transport measurements revealed that planar defects dominate
flux pinning in the investigated Co-doped BaFe2As2 thin film. For any given
field and temperature, the critical current depends only on the angle between
the crystallographic c-axis and the applied magnetic field but not on the angle
between the current and the field. The critical current is therefore limited
only by the in-plane component of the Lorentz force but independent of the
out-of-plane component, which is entirely balanced by the pinning force exerted
by the planar defects. This one-dimensional pinning behavior shows similarities
and differences to intrinsic pinning in layered superconductors.Comment: 8 pages, 6 figure
