Magnetic relaxation formation at elastic dissipation expense in rotational magnetometer scheme

 

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

Kotel’nikov Institute of Radio Engineering and Electronics of RAS
 

The paper is received on October 21, 2014

 

Abstract. The classic rotational magnetometer scheme intended for weak magnetic field measuring is considered. It is shown the importance of magnetic relaxation formation mechanism at elastic waves excitation expense in magnetoelastic medium. It is investigated the nonlinear task about the magnetization precession excitation in ferrite plate having the magnetoelastic properties. It is shown that the ferromagnetic resonance dissipation in the great degree is formed by the connection with elastic medium. It is found the resonance line splitting the more pronounced the more the magnetoelasticity constant is larger. For rotational magnetometer there is shown the magnetic vibrations train  excitation by rotational field where the dissipation is formed by the elastic waves excitation.

Key words: weak magnetic field, rotational magnetometer, magnetoelastic interaction, magnetic dissipation.