Energy Loss Decrease of Magnetic Domain-wall Motion with Nonlinear Control

Abstract

Chaos and control of Bloch wall motion is investigated. As for frequency and drive force coefficient, the movement of the magnetic domain wall becomes unstable in the vicinity of 2MHz and 0.2TA/m in this thesis. It is shown that the unstable magnetic domain-wall motion is stabilized and its energy loss is decreased by using the nonlinear feedback control.