  We explore the magnetic-field-driven motion of domain walls with different
chiralities in thin ferromagnetic films made of Pt/Co/Pt, Au/Co/Pt, and
Pt/Co/Au. From the analysis of domain wall dynamics, we extract parameters
characterizing the interaction between domain walls and weak pinning disorder
of the films. The variations of domain wall structure, controlled by an
in-plane field, are found to modify the characteristic length-scale of pinning
in strong correlation with the domain wall width, whatever its chirality and
the interaction strength between domain walls and pinning defects. These
findings should be also relevant for a wide variety of elastic interfaces
moving in weak pinning disordered media.
