data for Formation of Magnonic Waveguides via Surface Anisotropy-Induced Bragg Mirrors

The data set designed for the reconstruction of the graphs identified in the manuscript as Fig. 2, Fig. 3 and Fig. 4 has been compiled. The data were obtained with finite element method software - COMSOL Multiphysics (simulations).

Fig. 2

The dataset was divided into three sets of files. For all sets of files, the format [‘column’ ‘column’] -> [‘wave vector’ ‘frequency’] was used. The data was separated by TAB.

The first set of files (‘Fig_2_lowest_limits_for_layers.txt’) contains the dispersion relations for the CoFeB layer without surface anisotropy and with implemented boundary conditions corresponding to the application of surface anisotropy on the top and bottom surfaces of the layer. The data were obtained by simulation by varying both the parameter k_{x} and k_{z}. The result obtained is a projection of the dispersion relation on the k_{z} axis.

The second set of files (‘Fig_2_waveguide_modes.txt’) contains the dispersion relations obtained for the corresponding mods located in the waveguide. 

The third set of files (‘Fig_2_magnonic_crystal_band_limits.txt’) contains the upper and lower band limits obtained for the magnonic crystal without defect. The last upper limit (‘artificial MC’) was introduced artificially after ensuring that there are no forbidden gaps in the visible part of the graph. The data were obtained by simulation by varying both the k_{x} and k_{z} parameters. The result obtained is the projection of the dispersion relation on the k_{z} axis.

Fig. 3

All data ('Fig_3_group_velocity.txt') for each mode were contained in the format [‘column’ ‘column’] -> [‘wave vector’ ‘group velocity’]. The data was separated by TAB. The unit in which the wave vector is expressed is rad/um and the group velocity is km/s. Data slightly smaller than 0 have been aggregated due to the group velocity formula which is dω/d(k_{z}) where ω = 2*π*frequency, k_{z} is the wave vector in the z-direction.

Fig. 4

All data ('Fig_4_reformulated_IPR.txt') for each mode were included in the format [‘column’ ‘column’] -> [‘wave vector’ ‘reformulated IPR’]. The data was separated by TAB. The unit in which the wave vector was expressed is rad/um and the relormulated IPR has no unit.