The influence of film-foundation on magnetoelastic vibrations in the structure “magnetic film – nonmagnetic foundation”

 

P. M. Vetoshko, V. G. Shavrov, V. I. Shcheglov

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

 

The paper is received on August 2, 2015 

 

Abstract. The excitation of magnetoelastic vibrations in structure “magnetic film – nonmagnetic foundation” on examples of magnetostriction transducer and rotational magnetometer schemes is considered. It is shown that the contribution of elastic system dissipation into magnetic system dissipation is very small, so as the dissipation of  magnetic system is defined by intrinsic processes of magnetic relaxation in the film. The film vibrates are so as its may have on the boundary of foundation the hard fixation. The vibration amplitude of foundation is much smaller than the vibration amplitude of film. It is shown that there is quasi-static shift deformation of foundation which is determined by properties of excitation and symmetry of magnetic field.

Key words: structure “film – foundation”, magnetoelastic interaction,  magnetostriction transducer, rotational magnetometer.