Peculiarities of resonances of elastic and magnetoelastic waves in (111)‐oriented two‐layered structure

Abstract

PACS 62.90.+k, 72.55.+s, 75.70.Cn, 75.80.+q The dimensional resonant frequency of elastic and magnetoelastic waves in bilayered structure: magnetic film-non-magnetic elastic substrate have been explored. The diagrams of resonant frequencies dependences upon material parameters of a system such as wave resistances, layers thicknesses have been constructed. Violation of the equidistant arrangement of resonant frequency harmonics for a composite bilayered structure has been shown.

Excitation of dimensional resonances of magnetoelastic and elastic waves in bilayered structure

“…2 and 3. The parameters used in calculations correspond to those taken in our previous work [11,12]. Figure 2 illustrates the resonant susceptibility dependence on a magnetic layer thickness for the odd harmonics number n. The letter β on the plots denotes the regions corresponding to the interface position coinciding with λ/4 (d ∼ λ/4) where λ is a MEE wavelength, the letter α denotes the regions where d ∼ λ/2, the letter γ marks the regions where the dimensional resonance is not excited.…”

“…Peculiarities of the dimensional resonance frequencies attributed to a nonmagnetic layer were discussed earlier in [11,12]. It was shown that an equidistant arrangement of harmonics series of the standing-wave resonant frequencies occurring in uniform magnetic film is violated in a bilayered structure.…”

“…In the previous studies [11,12] it was shown that the resonant frequencies dependences, in particular ω n (d) of a bilayer have the peculiarities that are revealed when an interface position coincides with a half-wavelength of the MEE standing wave. The shape of the peculiarities is defined by the relation between elastic parameters of a system and the type of boundary conditions.…”

Shear Thickness Modes in a Presence of Magnetoelastic Waves Parallel to a Surface Guided by Ferromagnetic Film

“…2. We follow the approach [9] assuming that magnetization of magnetic film can be divided in spatially independent and spatially dependent parts M=M 1 (t)+M 2 (r,t)…”

“…Note that MEW in uniform ferromagnetic plates restricted in one dimension have been investigated earlier [7,8]. Peculiarities of dimensional resonances of MEW have been considered in [9]. However, sufficient attention has not heretofore been paid to the influence of MEW propagating in a surface plane on the thickness modes of MEW guided by ferromagnetic film.…”