On importance of pulsing alternating decaying magnetic field during demagnetization of ferromagnetic materials
Object and purpose of research. This paper discusses the importance of pulsing alternating decaying magnetic field during demagnetization of ferromagnetic materials. The purpose of this study is to understand the importance of magnetic field parameters during demagnetization of ferromagnetic materials. Materials and methods. Ferromagnetic theory and its technical applications; the theory of asymmetric remagnetization cycles for ferromagnetic materials; normalization methods for magnetic parameters of ferromagnetic materials and their graphic representations; theory of limits; numerical solutions to non-linear algebraic equations; magnetic test results for ferromagnetic steels. Main results. This paper differentiates and identifies the contributions of damping ratio and pulse number to the strength of pulsing alternating decaying magnetic field during demagnetization of ferromagnetic materials, demonstrating that complete demagnetization of ferromagnetic materials can be achieved not as the final result of demagnetization process but only as its intermediate result at certain damping ratios and even pulse number of magnetic field strength. Conclusion. This study explains a number of phenomena in demagnetization of ferromagnetic materials. It also introduces and defines the notion of utilization efficiency for decaying magnetic field during demagnetization of ferromagnetic materials, as well as facilitates optimal selection of damping ratio and pulse number for the strength of pulsing alternating decaying magnetic field at which this field will be efficient for demagnetization of ferromagnetic materials down to required level.