Figure 2
From: Demonstration of a robust magnonic spin wave interferometer
Dispersion curve of Au/YIG system.
(a) Two dimensional infinite slab model used in the calculation. From the top, there is air above y = d/2 + tAu, nonmagnetic metal (NM, Au) between y = d/2 + tAu and d/2, ferromagnet (FM, YIG) between y = d/2 and −d/2 and dielectric material (gadolinium gallium garnet, GGG) below y = −d/2. (b) Calculated dispersion curves for the Au/YIG system. Dashed black line shows the mode kFS representing the dispersion curve of a free slab without an Au layer. kPEC shown by the bold black line is that of a slab metallized by a perfect electrical conductor. Other lines are dispersion curves calculated for a slab metallized by 30 nm thick Au. Bold lines show the real part of the wavevectors 
and 
. Bold dotted lines show the imaginary part of the wavevectors 
and 
.
