Penetration of a plane electromagnetic wave into a moving ferromagnetic medium

Abstract

The article is devoted to mathematical modeling of the penetration of the electromagnetic field into a moving ferromagnetic conducting medium. It is shown that the depth of penetration of a plane electromagnetic field depends both on the speed of movement and on the direction of movement of the medium. The movement of the medium "towards" the field reduces the depth of its penetration into the material, which is equivalent to an increase in the frequency of the field. At certain speeds of movement of the medium in the direction of the field, the penetration depth increases so much that the medium becomes "transparent" and there is no attenuation of the field. It is shown that the vibration of a thin ferromagnetic plate in the electromagnetic field, even in the case of a linear medium, leads to nonlinear oscillations of the field in the substance. The nonlinearity of the medium affects the value of the field attenuation but the nature of the field does not change significantly. It is shown that the vibration of a thin ferromagnetic plate increases the field penetration depth compared to the case of a stationary medium.