Magnon diffusion lengths in Li0.5Al0.7Fe1.8O4 epitaxial films are nearly identical along [100] and [110] at 250 K, consistent with nearly isotropic exchange stiffness.
Nor could it be attributed to anisotropic two-magnon scattering, which could not simultaneously account for the larger offset and smaller slope of the [110] linewidth 49,50
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Nearly Isotropic Magnon Transport in Epitaxial Lithium Aluminum Ferrite Thin Films
Magnon diffusion lengths in Li0.5Al0.7Fe1.8O4 epitaxial films are nearly identical along [100] and [110] at 250 K, consistent with nearly isotropic exchange stiffness.