A BETHE-LATTICE APPROACH TO THE SPIN WAVE EXCITATIONS NEAR THE INTERFACE OF TWO FERROMAGNETIC INSULATORS
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Abstract
The property of spin wave spectra near the interface of two ferromagnetic insulators is studied. Starting from Heisenberg model and using Bethe -lattice approximation and Green's function technique, the local density of magnon states (LDOMS) is calculated for different parameters. A gap in the LDOMS is found in certain parameter region.
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