Spin waves propagation in arrays of single- and bi-component thin magnetic stripes: A micromagnetic study

We performed a thorough micromagnetic investigation of spin waves propagation in extended ferromagnetic films and in arrays of either single- or bi-component ferromagnetic stripes, encompassing both the dipolar-dominated and the exchange-dominated regions. The considered nanostructures represent one-dimensional magnonic crystals where allowed and forbidden frequency intervals appear due to the artificial periodicity. It is shown that both the bandwidth and the decay length of propagating spin modes depend on the geometrical characteristics of the artificial structures. The results of the present “virtual experiments” can be exploited to design miniaturized and tunable magnonic filters for microwave applications.