Comparison of spin-wave transmission in parallel and antiparallel magnetic configurations

Parallel (P) and antiparallel (AP) configurations are widely applied in magnetic heterostructures have significant impacts on the spin-wave transmission magnonic devices. In present study, a theoretical investigation was conducted into of exchange-dominated spin waves with nanoscale wavelengths type heterostructure including two media, which magnetization state can be set to P configuration by ferromagnetic (antiferromagnetic) interfacial exchange coupling (IEC). The boundary conditions AP cases were derived, reflection coefficients analytically given numerically calculated. configuration, critical angle $\theta_{\textrm{c}}$ always exists has influence transmission. Spin refracted reflected when incident $\theta_{\textrm{i}}$ is smaller than ($\theta_{\textrm{i}} < \theta_{\textrm{c}}$), while total occurs as $\theta_{\textrm{i}} \geq \theta_{\textrm{c}}$. polarizations medium 1 2 inverse, that is, right-handed (RH) left-handed (LH), leading being independent $\theta_{\textrm{i}}$. As demonstrated difference properties between \theta_{\textrm{c}}$) cases, there polarization-dependent scattering. However, exceeds $\theta_{\textrm{c}}$, > case exhibits similarities case, where transmitted found evanescent their decay lengths investigated.