Models of elastic and inelastic flux switching

The total waveform of a square-loop magnetic core switched by MMF from negative remanence is composed of elastic , decaying inelastic , and bell-shaped main inelastic . The worst delta noise in a coincident-current memory core pair is essentially . The sources of these components and the static curve are explained qualitatively by means of the random variations of the energy gradient vs. domain-wall position: elastic wall displacements and elastic rotation of magnetization induce ; minor inelastic wall displacements of essentially constant wall areas induce ; and major inelastic wall displacements (involving domain collisions) of varying wall areas induce . Semiempirical models for the components are based on the characteristics of these displacements. A satisfactory agreement is obtained between these models and oscillograms of a thin ferrite core.