Sun, Z. Z. and Schliemann, J. and Yan, P. and Wang, X. R. (2011) Current-induced domain wall motion with adiabatic and nonadiabatic spin torques in magnetic nanowires. EUROPEAN PHYSICAL JOURNAL B, 79 (4). pp. 449-453. ISSN 1434-6028,
Full text not available from this repository. (Request a copy)Abstract
We investigate current-driven domain wall (DW) propagation in magnetic nanowires in the framework of the modified Landau-Lifshitz-Gilbert equation with both adiabatic and nonadiabatic spin torque (AST and NAST) terms. By employing a simple analytical model, we can demonstrate the essential physics that any small current density can drive the DW motion along a uniaxial anisotropy nanowire even in absence of NAST, while a critical current density threshold is required due to intrinsic anisotropy pinning in a biaxial nanowire without NAST. The DW motion along the uniaxial wire corresponds to the asymptotical DW oscillation solution under high field/current in the biaxial wire case. The current-driven DW velocity weakly depends on the NAST parameter beta in a uniaxial wire and it is similar to the beta = alpha case (alpha: damping) in the biaxial wire. Apart from that, we discuss the rigid DW motion from both the energy and angular momentum viewpoints and point out some physical relations in between. We also propose an experimental scheme to measure the spin current polarization by combining both field- and current-driven DW motion in a usual flat (biaxial) nanowire.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PROPAGATION; DYNAMICS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Jun 2020 06:07 |
| Last Modified: | 26 Jun 2020 06:07 |
| URI: | https://pred.uni-regensburg.de/id/eprint/21289 |
Actions (login required)
 |
View Item |
