THE INFLUENCE OF AN ELECTRIC-CURRENT DENSITY ON THE COMPLEX PERMEABILITY

In an attempt to influence the domain wall damping, an ac electric cur rent was driven through contacted ferrite ring cores and parallelepipe ds in different directions. The dependence of magnetic properties on c urrent density phase shift between the winding current and material cu rrent and current direction was measured. Changes in magnetic flux due to the additional magnetic field arising from the material current we re considered. Variations of the complex permeability as a function of current phase shift and coaxial or radial direction were observed. Ch anges in damping and resonance frequency can be interpreted as due to the interaction of the electric current with domain walls. The observe d effects can be explained by the domain drag effect.