STUDY OF FILTRATION MODES IN A CROSS-SHAPED MICROWAVEGUIDE BASED ON A YIG FILM WITH MAGNETITE NANOPARTICLES

Abstract

Recently, a new direction of spintronics using ferrite garnets has been actively developing - magnonics, within the framework of which the transport properties of spin-polarized electrons are not used, and the transfer of information occurs by transmitting a signal using spin waves (SW). With this approach, it is possible to implement a number of functional blocks for signal processing based on the principles of magnonics.
Also, much attention is currently paid to the possibility of using magnetic media in biomedicine. Magnetic nanoparticles are actively used in biomedicine due to their unique properties, such as high sorption capacity, the possibility of remote control. In addition to diagnostic purposes, magnetite nanoparticles contrast well in MRI, they are also used for targeted delivery of drugs.
Yttrium iron garnet (YIG) films are used as magnetic material for the formation of magnetic waveguide structures, demonstrating record low values of SW attenuation, including at nanometer YIG thicknesses.
In this paper, a magnonic microwave guide with an array of magnetic elements located on the surface was investigated. The method of micromagnetic modeling based on the numerical solution of the Landau–Lifshitz–Gilbert equation was used to study the possibility of controlling the propagation of spin waves in a cross-shaped structure with magnetite nanoparticles based on an iron–yttrium garnet film by changing the direction of the external magnetic field.

Speaker

Fedor Garanin
Saratov State University
Russia

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