Experimental investigation and simulation of magnetostatic wave solitons in thin YIG films

Recently, nonlinear magnetostatic wave propagation in thin YIG films has been attracting great attention for its potential use in microwave devices. From the practical point of view, the study of soliton propagation in a long YIG sample is important for the development of such nonlinear MSW devices. We made a long sample of YIG film with five electrodes (width=40 μm and separation=3 mm) to study the soliton propagation. We used the magnetostatic forward volume wave at the carrier frequency of 2.699 GHz and an input pulse of 12 ns. Although the soliton was observed up to the third electrode, it was not observed at the fourth electrode due to increasing insertion loss. The observed soliton waveforms were simulated by the method developed by us. Excellent agreement was obtained. These results will be very useful for the development of nonlinear MSW devices in the future