000001502 001__ 1502
000001502 005__ 20190130104944.0
000001502 02470 $$2doi$$a10.1088/1361-648X/aa9698
000001502 037__ $$aARTICLE-2018-015
000001502 041__ $$aeng
000001502 245__ $$aCurrent-induced instability of domain walls in cylindrical nanowires
000001502 260__ $$c2018
000001502 269__ $$a2018
000001502 336__ $$aArticles
000001502 520__ $$aWe study the current-driven domain wall (DW) motion in cylindrical nanowires using micromagnetic simulations by implementing the Landau–Lifshitz–Gilbert equation with nonlocal spin-transfer torque in a finite difference micromagnetic package. We find that in the presence of DW, Gaussian wave packets (spin waves) will be generated when the charge current is suddenly applied to the system. This effect is excluded when using the local spin-transfer torque. The existence of spin waves emission indicates that transverse domain walls can not move arbitrarily fast in cylindrical nanowires although they are free from the Walker limit. We establish an upper velocity limit for DW motion by analyzing the stability of Gaussian wave packets using the local spin-transfer torque. Micromagnetic simulations show that the stable region obtained by using nonlocal spin-transfer torque is smaller than that by using its local counterpart. This limitation is essential for multiple DWs since the instability of Gaussian wave packets will break the structure of multiple DWs
000001502 546__ $$aEnglish
000001502 655__ $$aHard condensed matter, structure, and dynamics
000001502 655__ $$aHard condensed matter and electronic properties
000001502 690__ $$aExternal experiment
000001502 7001_ $$aWang, Weiwei
000001502 7001_ $$aZhang, Zhaoyang
000001502 7001_ $$aPepper, Ryan A
000001502 7001_ $$aMu, Congpu
000001502 7001_ $$aZhou, Yan
000001502 7001_ $$01391$$aFangohr, Hans
000001502 773__ $$j30$$pJ. Phys.: Condens. Matter$$q015801$$tJournal of Physics: Condensed Matter
000001502 790__ $$aEuXFEL staff
000001502 790__ $$aOther
000001502 85641 $$uhttp://iopscience.iop.org/article/10.1088/1361-648X/aa9698
000001502 8560_ $$fkurt.ament@xfel.eu
000001502 8564_ $$s1191414$$uhttps://xfel.tind.io/record/1502/files/Wang_2018_J._Phys.%253A_Condens._Matter_30_015801.pdf
000001502 8564_ $$s2006666$$uhttps://xfel.tind.io/record/1502/files/Wang_2018_J._Phys.%253A_Condens._Matter_30_015801.pdf?subformat=pdfa$$xpdfa
000001502 900__ $$aControl and Analysis Software
000001502 980__ $$aARTICLE