UDC 537.871.7
Spectral properties of magnetoelastic waves in the
gap structure of ferromagnetic films during their subsonic relative
displacement
Sergey N. Maryshev 1 , Alexey V.
Moiseev 1 , Evgeny A. Vilkov 2, Lev A. Fomin 3
1 Moscow Institute of physics and technology (national research
University) (MIPT), Institutsky lane, 9, Dolgoprudny, Moscow region 141701,
Russia
2 Fryazino Branch of Kotelnikov
Institute of Radioengineering and Electronics of the Russian Academy of
Sciences, Vvedensky Sq.1, Fryazino Moscow region 141190, Russia
3
Institute of Microelectronic Technology and High
Purity Materials of Russian Academy of Sciences, Ac. Osipyana 6, Chernogolovka, Moscow Region 142432, Russia
The paper is received on June 24, 2019
Abstract. Theoretically we consider
the influence of the relative longitudinal displacement (RLD) of ferromagnetic
films of planar structure with a gap on the propagation of slot-hole magnetoelastic
waves. It is found, that taking into account the thickness of ferromagnetic
media leads to the displacement of the initial points of the branches of the
spectrum of magnetoelastic waves. The spectrum of volume acoustic waves in
films is split into two lines due to the movement of crystals. The spectrum of
other acoustic modes of the film structure has no splitting and is transformed
similarly to the spectrum of magnetostatic waves. It is revealed from the
analysis of the obtained spectrum of slot-hole magnetoelastic waves at RLD,
that both the phase and group speed of the waves and the type of wave
dispersion can be changed within a wide range by changing the speed and
direction of the crystals. It can lead to the appearance of an anomalous
Doppler effect, which is characteristic for the artificial metamaterial.
Results of researches can be a theoretical basis for the development of systems
of monitoring of devices in which moving of details is the basis for
functioning.
Keywords: magnetoelastic surface
waves, slot-hole waves, magnetostriction, ferromagnetic film, relativity of
moving, wave dispersion, symmetric and antisymmetric modes.
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For citation:
S. N. Maryshev, A. V. Moiseev, E. A.
Vilkov, L. A. Fomin. Spectral properties of
magnetoelastic waves in the gap structure of ferromagnetic films during their
subsonic relative displacement. Zhurnal
Radioelektroniki - Journal of Radio Electronics. 2019. No. 7. Available at http://jre.cplire.ru/jre/jul19/8/text.pdf
DOI 10.30898/1684-1719.2019.7.8