  In this work we carried out systematic experimental and theoretical
investigations of the ferromagnetic (FMR) response of quasi-two-dimensional
magnetic nano-objects - microscopically long nanostripes made of ferromagentic
metals. We were interested in the impact of the symmetries of this geometry on
the FMR response. Three possible scenarios, from which the inversion symmetry
break originated, were investigated:(1) from the shape of the stripe
cross-section, (2) from the double-layer structure of the stripes with exchange
coupling between the layers, and (3) from the single-side incidence of the
microwave magnetic field on the plane of the nano-pattern. The latter scenario
is characteristic of the stripline FMR configuration. It was found that the
combined effect of the three symmetry breaks is much stronger than the impacts
of each of these symmetry breaks separately.
