Experimental data, published by Bostanjoglo and Gemünd, on the extraordinary viscous domain wall motion in thin oxidized films of 83 at % NiFe are analyzed. It is assumed that the velocity v of the wall is governed by the interaction of the wall with defects present in the film and that this interaction can be overcome by thermal activation. The activation energy E is calculated from the experimental data v(H, T) (H applied magnetic field, T temperature). E is a unique smooth function of H. From the obtained relation E(H), information on the force‐distance profile of the interaction between defect and wall is derived.