Magnetic properties of pipe-layers of magnetized chain of spheres: a control based on measured magnetic properties of its cores

Abstract

The use of circular contour sensors on printed circuit boards placed between contacting spheres with radius R in the magnetized chain of balls makes it possible to measure magnetic microflows in the chain along its cores of different radius r_c. Thus, it becomes possible to obtain information about the magnetic properties of not only the cores of the chain themselves, but also its pipe quasi-functional layers limited by adjacent sensors. It is the purpose of the work. According to the magnetic flux measured with the help of well-recommended contour sensors (eight: from r_c/R from 0.2 to 0.9) at magnetizing fi eld intensity in the range of 10–55 kA/m, magnetic flux is established along seven pipe-layers of relative radius r_p/R (from 0.25 to 0.85). The values χ_p of their magnetic susceptibility were found, as the r_p/R values increase χ_p-values decrease according to the inverse power dependence with a power degree equals 2.4. The values of the demagnetizing factor are set and functionally approximated for pipe-layers in relatively short chains of different lengths (with a number of spheres from 2 to 8). The obtained information expands idea about magnetization a chain of granules as the basic element of the granular medium. This information is useful in detailing the characteristics of such heterogeneous media used to solve scientific and practical problems, in particular, to clarify the conditions for building zones that are responsible for the magnetic capture of magnetoactive particles between granules of working elements (matrix type) of polygradient magnetic separators and analyzers.