Efficiency of excitation of dimensional resonances of magnetoelastic waves in layered structure

Abstract

This paper reports the study of elastic and magnetoelastic waves in two-layered structure: magnetic film – non-magnetic substrate, restricted in one dimension. We have investigated behavior of elastic and magnetoelastic standing waves resonant frequencies dependent on the relative thicknesses of magnetic and non-magnetic layers. Magnetic susceptibility of magnetic film placed on non-magnetic substrate and character of its behavior in the vicinity of frequencies of dimensional resonances of magnetoelastic and elastic waves are studied. We have explored susceptibility dependence on the relation between magnetic and non-magnetic layers parameters. By change of the thickness of magnetic layer relative to overall thickness of a sample we can regulate magnetic susceptibility and therefore efficiency of excitation of definite harmonics of standing magnetoelastic and elastic waves. If even number of magnetoelastic half waves falls to magnetic layer corresponding harmonics of magnetoelastic and elastic wave disappears. In particular odd harmonics disappear when magnetic film occupies half space of a sample. Magnetic susceptibilities reveal peculiarities in their behavior dependent on material parameters change.