Magnetic polaritons, magnetostatic waves and effective-medium approximation for antiferromagnetic superlattice with impurity in parallel magnetic field

buir.contributor.orcidTanatar, Bilal|0000-0002-5246-0119en_US
dc.contributor.authorTagiyeva, Rehile T.en_US
dc.contributor.authorTanatar, Bilalen_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractWe derive the general effective-medium expression for the surface-guided magnetic polaritons and magnetostatic waves, which propagate in the antiferromagnetic superlattice with antiferromagnetic impurity film, and investigate the influence of the external magnetic field on the energy of localized magnetic polaritons. Similarly as in the free-standing antiferromagnetic film, the spectrum of magnetic polaritons in the presence of an external magnetic field is reciprocal in the sense that the frequency is independent of the direction of propagation. In the system under consideration one finds both the surface polaritons which are strongly localized in the antiferromagnetic film which acts as a waveguide, and waves which are weakly localized within film. The first waves are the pure surface modes or guided modes where excitations have a standing-wavelike character. This important feature of the localized magnetic polaritons enables us to use these antiferromagnetic systems in the technologies for devices (for example, in resonators) that work at wavelengths in the infrared region. Second waves have the very small value of the decay parameter and appear in the regions where the surface mode penetrates into the bulk band, i.e. the magnetic polaritons are weakly localized in the impurity film region. Now we obtain themixed type mode having both bulk and surface characteristics. Also, the general way in which the dispersion curves vary with the volume fraction of the superlattice components and with impurity film is illustrated in this study.en_US
dc.source.titleJournal of Superconductivity and Novel Magnetismen_US
dc.subjectAntiferromagnetic superlatticeen_US
dc.subjectDispersion relationen_US
dc.subjectMagnetic polaritonen_US
dc.subjectMagnetostatic waveen_US
dc.subjectAntiferromagnetic filmsen_US
dc.subjectAntiferromagnetic systemsen_US
dc.subjectDecay parametersen_US
dc.subjectDispersion curvesen_US
dc.titleMagnetic polaritons, magnetostatic waves and effective-medium approximation for antiferromagnetic superlattice with impurity in parallel magnetic fielden_US
dc.typeConference Paperen_US