| Author(s): |
Soo-Man Seo; Kyoung-Whan Kim; Jisu Ryu; Hyun-Woo Lee; Kyung Jin Lee; |
| Title: |
Current-induced motion of a transverse magnetic domain wall in the presence of spin Hall effect |
| Published: |
July 09, 2012 |
| Abstract: |
We study theoretically current-induced dynamics of a transverse magnetic domain wall in bi-layer nanowires consisting of a ferromagnet on top of a nonmagnet having strong spin-orbit coupling. Domain wall dynamics is characterized by two threshold current densities, J_th^WB and J_th^REV, where J_th^WB is a threshold for the chirality switching of the domain wall and J_th^REV is another threshold for the reversed domain wall motion caused by spin Hall effect. The domain wall with a certain chirality may move opposite to the electron-flow direction with high speed in the current range J_th^REV < J < J_th^WB for the system designed to satisfy the conditions J_th^REV < J_th^WB and \alpha > \beta where \alpha is the Gilbert damping constant and \beta is the nonadiabaticity of spin torque. Micromagnetic simulations confirm the validity of analytical results. |
| Citation: |
Applied Physics Letters |
| Volume: |
101 |
| Issue: |
2 |
| Keywords: |
spin-transfer torque; domain wall motion; spin Hall effect |
| Research Areas: |
Spintronics |
| PDF version: |
 Click here to retrieve PDF version of paper (1MB) |
