Bloch oscillations in arrays of magnetic structures

Abstract

Currently, the traditional approach for the generation, transmission and processing of information signals is the use of systems based on semiconductor transistors as the basic elements. The carrier of information signals in this case is an electric current with an electronic or hole component. A decrease in topological norms and a corresponding increase in the number of transistors in integrated circuits is possible only when solving a number of fundamental problems - the problems of heat generation due to ohmic losses and the problems of organizing internal inter-element connections in integrated circuits [1,2]. The study of spin-wave phenomena in micro- and nanoscale ferromagnets is of fundamental interest for understanding the processes of wave propagation and transformation in media with reduced dimension (one-dimensional and two-dimensional) and distributed inhomogeneities - in periodic, modulated and discrete environments[3].

Using the numerical methods and the Brillouin light spectroscopy method, we study the processes of discrete diffraction of SW and formation of Bloch oscillation in a system of laterally coupled magnonic stripes. Numerical modeling was carried out and based on the analysis of solutions of the discrete nonlinear Schrödinger equation.

Brillouin light scattering study of lateral spin wave transport was supported by Russian Science Foundation (#20-79-10191). Growing of YIG films was supported by the Russian Foundation for Basic Research Grants (#19-37-90145).

[1] V.V. Kruglyak, S.O. Demokritov, D. Grundler. Magnonics. J. Phys. D: Applied Physics 43, 264001 (2010).
[2] A. V. Sadovnikov, A. A. Grachev, S. E. Sheshukova, Yu. P. Sharaevskii, A. A. Serdobintsev, D. M. Mitin, S. A. Nikitov Magnon straintronics: Reconfigurable spin-wave routing in strain-controlled bilateral magnetic stripes // Phys. Rev. Lett. 120, 257203 (2018)
[3] A. V. Sadovnikov, A. A. Grachev, A. A. Serdobintsev, S. E. Sheshukova, S. S. Yankin, S.A. Nikitov Magnon straintronics as an alternative controllable way of spin-wave computation: strain reconfigurable magnonic-crystal directional coupler// IEEE Magnetics Letters. Vol. 10. 5506405

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Grachev Andrey
Saratov State University
Russia

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