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Information × Registration Number 0216U002012, 0114U006078 , R & D reports Title The layered magnetic structures as controlled frequency-selective metasurfaces for electromagnetic and acoustic waves popup.stage_title Head Savchenko Andrii Sergijovych, Registration Date 15-01-2016 Organization Donetsk Institute of Physics @ Engineering named after O.O.Galkin NAS of Ukraine popup.description2 The object of study - the spin-wave electrodynamics and spin -wave acoustic of interface of the nonmagnetic and magnetic ordering media, including layered magnetic media under the influence of external factors, in particular the DC magnetic and electric fields. The purpose of the work - the theoretical definition of the conditions under which a combination of intensity and the relative orientation of the external magnetic and electric field makes it possible to effectively control the localization and propagation of electromagnetic and acoustic waves in magnetic (especially layered) structures, in order to study the use of this class of media as the frequency selective surface with controllable dynamic characteristics. Research methods - methods of theoretical acoustics and electrodynamics of bounded media, methods of mathematical and computer modeling, methods of mathematical physics, in particular solutions of differential equations in partial derivatives, numerical methods.In this is studied a cycle of theoretical studies to determine the conditions under which the magnetic (including layered), the medium becomes the dynamic properties of frequency selective surface, controlled by an external constant magnetic or electric field. These conditions result from the study of the new features of the spin-wave electrodynamics and acoustics of the interface of the magnetic and non-magnetic nedia. Proved the impact of electric and magnetic fields on the simultaneous achievement of the extreme values of surface wave impedance and maximize the intensity of the evanescent wave depends on its frequency, polarization and the wave number. This analysis is performed for a layered medium with magnetic in Otto and Kretschmann geometry, the plate, as well as the boundaries of one-dimensional magnetic photonic crystal. Clarify the connection between the spectrum of surface or bulk magnetic polaritons and magnetic polaritons flowing into the next, the optically denser medium and conditions of the selective transparency of the surface of the corresponding bounded magnetic medium. The conditions under which in total internal reflection increase the effect Goos-Hanchen possible in the case of a single interface between the optically transparent media. Here are some examples of the implementation of the mechanism of increase Goos-Hanchen shift interface optically denser medium and gyrotropic and pseudochiral media. The relationship between the conditions of formation of specific surface waves, for which the flow of energy through the boundary between zero at any time and the main types of artificial spatially structured frequency-selective metasurfaces. This, in particular, makes it possible to consider an interface bianisotropic - optically isotropic and transparent media, as controlled by frequency selective surface. The conditions under which the interference of phonon and magnetic dipole indirect spin - spin interactions leads to the formation of low-temperature plate piezomagnet new class of nonexchange spin waves. We received and analyzed the ratio that determines the dispersion properties of this type of spin - wave excitations. In contrast to previously known types nonexchange magnon (as dipole and elastostatic) class nonexchange spin waves, which are discussed in the work has only dispersion while taking as a magnetic dipole, and phonon mechanisms of indirect spin - spin interactions. It is shown that simultaneous consideration along with the linear magnetostriction also magnetoelastic interaction leads to a fundamental restructuring of the spectrum shear surface elastic waves that propagate along the surface of the mechanically free crystal piezomagnetic. It performs a series of analytical calculations related to the definition of the reflection coefficient of shear bulk wave incident from an isotropic nonmagnetic medium to the surface considered semi-infinite AFM piezomagnet. Product Description popup.authors Буханько Артем Федорович Житлухіна Олена Сергіївна Кошина Олена Адольфівна Любчанський Ігор Леонідович Пилипенко Катерина Олександрівна Приходько Оксана Володимирівна Шевцова Тетяна Миколаївна popup.nrat_date 2020-04-02 Close