Features of Magnetization of Ferromagnetic Composites: Role of Grain Chains on an Example of Granulated Media

Abstract

An original approach to measuring magnetic (micro) fluxes along cores of different radii in a magnetized chain of ferromagnetic spheres has been developed and described. It is based on the use of radially different circular circuit sensors created using the technology of printed circuit boards and placed between contacting spheres in a chain. Such stepwise magnetic flux data also made it possible to judge the data of stepwise changes in magnetic flux in conventional tubular layers (limited by adjacent circular sensors). Based on all these data, extensive information was obtained on the magnetic parameters of the cores and "pipe-layers" of the magnetized chain of spheres (as quasi-continuous ferromagnets), namely, the values of flux density (induction) in the cores and "pipe-layers", their magnetic permeability, susceptibility, magnetization in a wide range of magnetizing field intensity. The purpose of the article is to develop a model of chain-by-chain magnetization of granular media, in which chains of granules are basic elements.