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.