  We consider model of quasi-2D magnetoelectric material as XY model for spin
system on a lattice with local multiferroic-like interaction of spin and
electric polarization vectors. We calculate the contribution of magnetic (spin)
vortex-antivortex pairs (which form electric dipoles) to the dielectric
susceptibility of the system. We show that in approximation of non-interacting
pairs at $T \rightarrow T_{BKT}$ (Berezinskii-Kosterlitz-Thouless temperature)
dielectric susceptibility diverges.
