[17p-P10-1~93] 10 スピントロニクス・マグネティクス（ポスター）

▼ [17p-P10-83] Curvature effects of current-induced domain wall motion in a U-shaped nanowire

〇Nobuyuki Umetsu¹、Tsuyoshi Kondo¹ (1.Toshiba Memory)

キーワード：magnetic domain wall, current induced domain wall motion, micromagnetics simulation

We have studied the current-induced domain wall motion (CIDWM) in the U-shaped nanowire (USN), as an example of the curved magnetic media, using the analytical one-dimensional model. The resultant equation reveals that an effective pinning-like field, induced by the spatial change of the nanowire curvature, emerges around the joint of the straight and the curved parts of USN. The numerical results of the DW dynamics indicate that CIDWM is obstructed at the joint, which agree qualitatively with the results of micromagnetics simulations. We show that the required current density for DW to go through the joint decreases monotonically with increasing nonadiabatic torque parameter and decreasing Gilbert damping constant.