History Effect of Time-Limited Excitation

Abstract
Electrically alterable switching characteristics have been observed in ferrite memory cores. Abnormal switching characteristics are caused by previous time‐limited switching and are not removed by subsequent ``hard'' saturation. The peaking time, peak amplitude, and magnitude of the flux change are all modified. It is proposed that the changes in switching behavior are due to formation of 360° Bloch walls during the combination of time‐limited switching and remagnetization to saturation.

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