A Consideration of the Phenomenon of Delayed Magnetization in Magnetic Soft Iron

Abstract

A change in the shape of the hysteresis curve, which arises together with a change in the measuring speed, was observed in automatic magnetic measurement of magnetic soft iron by using a ring specimen. A larger thickness of specimen, a higher annealing temperature, and a quicker measuring speed caused an increase in the apparent coercive force. It was shown that the phenomenon was caused by the delay in magnetization. The delayed magnetic flux density produced an inclination to the result of calculation based on the penetration depth of the magnetization.