  It is shown that a local bend of a nanowire is a source of pinning potential
for a transversal head-to-head (tail-to-tail) domain wall. Eigenfrequency of
the domain wall free oscillations at the pinning potential and the effective
friction are determined as functions of the curvature and domain wall width.
The pinning potential originates from the effective curvature induced
Dzyaloshinsky-like term in the exchange energy. The theoretical results are
verified by means of micromagnetic simulations for the case of parabolic shape
of the wire bend.
