Controlling Chaos of Magnetic-Domain-Wall Motion by using Delayed-Feedback-Control with Automatic Gain-Adjustment

Abstract

In this research, the chaotic motion of magnetic domain wall is controlled by using Delayed-Feedback-Control (DFC) with automatic gain-adjustment, modified by Nakajima and Ueda in 1995. The method of automatic gain-adjustment is newly applied to Extended-DFC (E-DFC) for more highly performance. It is clearly confirmed that the control-gain was automatically adjusted on each results. But, in this case, the response of E-DFC has not been improved. It is found that the delayed time has strongly influenced on the response. The selective E-DFC is proposed and the response was best.