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In this study, the influence of triangle and rectangle notches with various sizes on current-induced domain wall motion has been investigated by utilizing micromagnetic simulation. Each notch plays a role in wall pinning, and the effect of wall pinning increases as the notch size increases. The phase diagram in a critical current density and a critical field for the notch shape is clarified. There are four modes in domain wall depinning by various current densities and magnetic fields.
Date of Publication: Nov. 2008