Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2020. No. 9
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DOI https://doi.org/10.30898/1684-1719.2020.9.3

UDC 537.871.7

 

Scattering of a magnetoelastic wave by a cavity in a ferromagnet with a rotating ferromagnetic cylinder

 

S. N. Maryshev 1, A. V. Moiseev 1, E. A. Vilkov 2

1 Moscow Institute of Physics and Technology (National University), 9 Institutskiy per., Dolgoprudny, Moscow Region, 141701, Russia

2 Fryazino Branch of Kotelnikov Institute of Radioengineering and Electrons of the Russian Academy of Sciences, Vvedensky sq., 1, Fryazino, Moscow Region, 141190, Russia


The paper is received on August 31, 2020

 

Abstract. Theoretically we consider the features of scattering of a plane shear magnetoelastic wave by a ferromagnetic rotating cylinder, which is placed without acoustic contact inside a ferromagnet of the iron-trium garnet type. It is shown that due to the connection between the rotating cylinder and the external magnetoactive medium by magnetic fields through the gap, the rotation of the cylinder in the cavity contributes to the redistribution of energy between the partial waves of the scattered field. As a result, there is a well-expressed asymmetry of the scattering polars in the vicinity of the ferromagnetic resonance frequencies and a modulation of small-scale oscillations of the spectra of the full cross-section of the scattering near the magnetoacoustic resonance that resembles beats. It is established that the rotation of cylindrical inhomogeneity can be considered as a new channel for controlling the propagation and transformation of magnetoelastic waves in metamaterials. It is noted that the results of wave scattering by the rotating cylindrical inhomogeneity of a ferromagnet can form a theoretical basis for the development of monitoring systems for devices in which the rotation of parts is the basis for functioning.

Key words: magnetoelastic waves, magnetostriction, ferromagnetic cylinder, rotation, polar scattering, total section of scattering.

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For citation:

Maryshev S.N., Moiseev A.V., Vilkov E.A. Scattering of a magnetoelastic wave by a cavity in a ferromagnet with a rotating ferromagnetic cylinder. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2020. No.9. https://doi.org/10.30898/1684-1719.2020.9.3 (In Russian)