Magnetoelectric and magnetoelastic properties of ferromagnetic shell of frequency-dependent resistor

The dependences of magnetoelectric properties and distribution rate of magnetoelastic vibrations in ferromagnetic sheath of FD (frequency-dependent) - resistor are investigated. The frequency of bending vibrations is obtained and its hysteresis in dependence on electric field strength, in which the investigated sample is put, is observed. The dependences of propagation velocity of magnetoelastic vibrations on external magnetic field for samples differing from each other by annealing mode which is carried out by the way of the passing of electric current of different density, are found. The property of FD-resistors to absorb the electro-magnetic radiation in frequency interval 50Hz-50MHz presents the big interest. The possibility to use in practice of these resistors in devices and high-voltage circuits is essentially defined by electro-physical, heat and magnetic properties of their ferromagnetic shells in impulse or alternating (low- and high-frequency) electric and magnetic fields. Up to now the different constructions of ferromagnetic shells, in which the different mixtures, containing the dielectric or metallic and ferromagnetic powders are used, have been developed and investigated. The ferromagnetic shell of FD-resistor is treated by different deformations leading to it destroy under the influence of external electromagnetic fields because of magnetoelectric effects. The aim of the given work is investigation of dependences of magnetoelectric and magnetoelastic characteristics of ferromagnetic shell of FD-resistor on external magnetic field and density of direct current passing through shell. The actuality of these investigations doesn´t give rise to doubt because well magnetoelectric and magnetoelastic characteristics decrease the FD-resistor operation life.