Nanocomposites and nanomaterials

The influence of broken spatial inversion symmetry inside interface on the phase shift of spin waves in magnonic crystals
Gusieva Y.I.1, Gorobets O.Y.1, 2, Gorobets Y.I.1, 2 

1 National Technical University of Ukraine ”Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine,

2 Institute of Magnetism, National Academy of Sciences of Ukraine, Kyiv, Ukraine 
E-mail: yuleva1313@gmail.com

Magnonics– the study of spin waves – has recently seen a burst of activity, fuelled by the prospect of magnetic field-controlled metamaterials and devices, capable of data processing with propagating spin waves as information carriers and using in nanoelectronics. Last years the study of phase shifters (PS) of spin waves (SW) attach much attention of researchers for development the logic devices encoding information in the phaseof travelling SW packets and utilizing them for data processing [1].
 The system consisting of two semi-infinite ferromagnetic medias separated by an interface is considered. Between those medias we assume boundary conditions with broken spatial inversion symmetry (BSIS) [2]. The dependence of PS between the transmitted and incident SW on the interlayer exchange coupling is obtained and analyzed for different value of parameter BSIS. The new possibility to introduce a controlled PS of the propagating SWs in nanomaterials, such as magnonic crystals, is in transmission through interface with BSIS. 
This project has received funding from the European Union`s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 644348 (Magic).

1.	Gruszecki P., Mailyan M., Gorobets O., and Krawczyk M. Goos-Hänchen shift of a spin-wave beam transmitted through anisotropic interface between two ferromagnets // Phys. Rev. B.-2017.-95, 014421.
2.	Kruglyak V.V., Gorobets O.Yu., Gorobets Yu.I., Kuchko A.N. Magnetization boundary conditions at a ferromagnetic interface of finite thickness // J. Phys.: Condens. Matter.-2012.-26, pp. 406001(2014).