Author： Yan P. Sun Z. Z. Schliemann J. Wang X. R.
Publisher： Edp Sciences
E-ISSN： 1286-4854|92|2|27004-27004
ISSN： 0295-5075
Source： EPL (EUROPHYSICS LETTERS), Vol.92, Iss.2, 2010-11, pp. : 27004-27004
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
One of the important issues in nanomagnetism is to lower the current needed for a technologically useful domain wall (DW) propagation speed. Based on the modified Landau-Lifshitz-Gilbert (LLG) equation with both Slonczewski spin-transfer torque and the field-like torque, we derive an optimal temporally and spatially varying spin current pattern for fast DW propagation along nanowires. Under such conditions, the DW velocity in biaxial wires can be enhanced as much as tens of times higher than that achieved in experiments so far. Moreover, the fast variation of spin polarization can efficiently help DW depinning. Possible experimental realizations are discussed.
Related content
Domain wall propagation in magnetic nanowires by spin-polarized current injection
EPL (EUROPHYSICS LETTERS), Vol. 65, Iss. 4, 2004-02 ,pp. :
Access to resources
Recommend
High-field domain wall propagation velocity in magnetic nanowires
EPL (EUROPHYSICS LETTERS), Vol. 86, Iss. 6, 2009-06 ,pp. :
Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
EPL (EUROPHYSICS LETTERS), Vol. 69, Iss. 6, 2005-03 ,pp. :