Abstract
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.
Original language | English |
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Pages (from-to) | 1227-1234 |
Number of pages | 8 |
Journal | Science China: Physics, Mechanics and Astronomy |
Volume | 54 |
Issue number | 7 |
DOIs | |
Publication status | Published - Jul 2011 |
Externally published | Yes |
Keywords
- current-induced nanopillar
- domain wall motion reversal
- magnetization switching
- spin transfer torque
- uniform magnetization reversal