Abstract
A change in the shape of the hysteresis curve was observed to accompany changes in the measurement speed during automated magnetic measurements of magnetically soft iron ring specimens. A larger specimen thickness, higher annealing temperature and quicker measurement speed each caused an increase in the apparent coercive force. It was shown that the phenomenon is caused by the delayed magnetization response. The general tendency of the measured delayed magnetic flux density agreed well with the result of calculations based on the penetration depth of the magnetization.
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