Magnetization switching modes in nanopillar spin valve under the external field
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, evol...
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Veröffentlicht in: | Science China. Physics, mechanics & astronomy mechanics & astronomy, 2011-07, Vol.54 (7), p.1227-1234 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 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 re- versal; 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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ISSN: | 1674-7348 1869-1927 |
DOI: | 10.1007/s11433-011-4313-1 |