On the Magnetic Aftereffect

This article first discusses the past experience regarding the time dependence of magnetization. A hypothesis of a formal analogy between the Jordan loss component and the dielectric aftereffect loss is then presented. Fundamental experiments that examine this hypothesis based on the classical theory are carried out. The frequency response of the permeability is measured, resulting in an order-of-magnitude confirmation of the theory. The switching experiment is executed using a ribbon and solid core of a Fe-Ni alloy. The invalidity of the superposition principle is discussed and an interpretation of the experimental results is given.