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|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|
|Keywords:||spin-transfer torque, domain wall motion, spin Hall effect|
|PDF version:||Click here to retrieve PDF version of paper (1MB)|