  We present theoretical study of ferromagnetic resonance in a system of two
coupled magnetic layers. We show that an interaction between the layers leads
to the occurrence of the so-called Fano resonance. The Fano resonance changes
the shape of the ferromagnetic resonance peak. It introduces a peak asymmetry.
The asymmetry type is defined by the sign of the interaction between the
magnetic layers. Therefore, studying the shape of the ferromagnetic resonance
peaks one can define the type of the interlayer coupling (ferromagnetic or
antiferromagnetic). We show that using numerical simulations one can estimate a
magnitude of the interaction by fitting the asymmetric resonance peaks.
