Spinwaves transmittance through antiferromagnetic impurities insured in perfect ordered ferromagnetic thin films

Abstract

In this paper, we introduce a theoretical approach, based on the matching technique, to study the magnetic properties and the spin dynamics in ferromagnetic thin film A containing an ordered magnetic impurities B with antiferromagnetic coupling between A and B sites. We examine, in particular, the coherent spinwaves diffusion via the A/B nanocontact.The total spinwaves transmittance by the B slab, taken as an impurity sites, in the system is calculated and analyzed for different cases of the spin intensity and the magnetic exchange constant values. The obtained results are compared, also, to those of the perfect ferromagnetic thin film A. The calculated properties are presented for all accessible frequencies in the propagating bands.The results highlight the localized spin states on the interface zone and their interactions with incident spinwaves and demonstrate the dependence of the magnetic properties on the interface parameters.