The Nonlinear Excitation of Hypersound in Bilayer Ferrite Structure

 

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

¹Syktyvkar State University, Syktyvkar, Russia

²Kotel’nikov Institute of Radio Engineering and Electronics, Moscow, Russia

Received February 19, 2013

Abstract. The nonlinear task about hypersound excitation in normal magnetized structure is investigated. This structure consist of two infinite magnetic dielectric plates put together. The magnetic and magnetoelastic parameters of plates are different but elastic parameters are the same. The motion equations and boundary conditions for magnetization and elastic displacement components are found in the case of arbitrary magnetization vector angle. The numeric calculation of equation system is made by Runge-Cutta method. It is shown that in nonlinear regime because of magnetic resonances connection the excited hypersound amplitude increases to a great extent and may to exceed the linear regime amplitude on two orders. 

Key words: hypersound, nonlinear vibrations, magnetoelasticity.