1) It is not indicated in the introduction whether any alternative to thin films of yttrium iron garnet is currently being considered for use as magneto-optical resonators. 2) How will the temperature dependence of the Faraday rotation hysteresis loops of Dy:CeYIG thin films change when moving to another wavelength range?
How can one explain the increase in the value of the Faraday rotation angle in the range of 30-40 degrees for Dy:CeYIG (Fig. 3f), which is absent for Ce:YIG (Fig. 3f)?