Journal of Radio Electronics. eISSN 1684-1719. 2023. 11
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DOI: https://doi.org/10.30898/1684-1719.2023.11.25

 

THE SECOND MAGNETOELASTIC RESONANCE IN STRUCTURE:

THIN MAGNETIC FILM THICK ELASTIC SUBSTRATE

 

V.S. Vlasov 1, V.N. Shaporov 1, V.G. Shavrov 2, V.I. Shcheglov 2

 

1 Syktyvkar State University

167001, Russia, Syktyvkar, Oktyabrskii prosp., 55

2 Kotelnikov IRE RAS

125009, Russia, Moscow, Mokhovaya str., 11, k. 7

 

The paper was received October 10, 2023.

 

Abstract. The task about excitation of connected magnetic and elastic vibrations in flat-parallel structure consisted of normal magnetized thin magnetic film applied on thick nonmagnetic substrate is considered. As a result of estimated task solution the amplitude-frequency characteristics of magnetic and elastic vibrations are found. It is shown that in conditions when the ferromagnetic resonance frequency is higher then own elastic vibration of the structure on the amplitude-frequency characteristics of magnetic vibrations applied the equidistance net of elastic resonances of structure. For the interpretation of observed resonance net it is proposed the model of phase synchronization between initial excitation and elastic wave which experience two passages along the thickness of structure. It is shown that the frequency of maximum elastic vibrations rounding exceeds frequency of maximum magnetization characteristic. The existence of own rounding elastic vibrations characteristic is named the second elastic system resonance. It is investigated the dependence of maximum second resonance characteristic from value of magnetoelastic interaction constant. It is shown that by increasing of this constant the frequency distance between both characteristic maxima increases. As a hypothesis of this increasing it is proposed the analogy with splitting of amplitude-frequency characteristic of system consisted of two connected resonators. It is investigated the amplitude-frequency characteristics magnetic and elastic vibrations in wide frequency region. On the equidistance elastic resonances net amplitude-frequency characteristic it is found the narrow equidistance disposed resonance depressions which are correspond to decreasing of amplitude more then two orders of value. It is shown that the frequency interval between neighbouring depressions is back proportional to distance between point of elastic vibrations registration and surface of substrate opposite to magnetic film. For the interpretation of depressions formation it is proposed the model which takes into account the phase opposition in registration point between wave which goes out of the excitation point and wave which is reflected from the opposite end of structure. Briefly noted some physical analogies of investigated phenomena.
Key words: magnetic film, nonmagnetic substrate, magnetoelastic resonance, connected vibrations.
Financing: The work was carried out within the framework of the state assignment of the V.A. Kotelnikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences.
Corresponding author: Shcheglov Vladimir Ignatyevich, vshcheg@cplire.ru 

 

 

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For citation:

 

Vlasov V.S., Shaporov V.N., Shavrov V.G., Shcheglov V.I. The second magnetoelastic resonance in structure: thin magnetic film thick elastic substrate. // Journal of Radio Electronics. 2023. . 11. https://doi.org/10.30898/1684-1719.2023.11.25 (In Russian)