期刊
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
卷 54, 期 7, 页码 1227-1234出版社
SCIENCE PRESS
DOI: 10.1007/s11433-011-4313-1
关键词
current-induced nanopillar; spin transfer torque; magnetization switching; domain wall motion reversal; uniform magnetization reversal
资金
- National Natural Science Foundation of China [5042810]
The current-induced magnetic switching is studied in Co/Cu/Co nanopillar with an in-plane magnetization traversed under the perpendicular-to-plane external field. Magnetization switching is found to take place when the current density exceeds a threshold. By analyzing precessional trajectories, evolutions of domain walls and magnetization switching times under the perpendicular magnetic field, there are two different magnetization switching modes: nucleation and domain wall motion reversal; uniform magnetization reversal. The first mode occurs at lower current density, which is realized by the formation of the reversal nucleus and domain wall motion; while the second mode occurs through complete magnetization reversal at higher current density. Furthermore, the switching time reduces as the spin-polarized current density increases, which can also be grouped into two reversal modes.
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