Features of Demagnetization Processes in Two-Dimensional Magnetoplasmonic Crystals Based on Permalloy

In this work, two-dimensional magnetoplasmonic crystals based on permalloy were fabricated and studied, and their morphology and magnetic properties were analyzed. It was shown that varying the exposure dose of electron resist using electron beam lithography allows control over the size and shape of individual columns forming two-dimensional diffraction gratings. The magnetization reversal processes of such structures are described by complex-shaped hysteresis loops with multistage magnetization switching, indicating the presence of interaction between adjacent columns.