Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2010-12-25
J. Phys.: Condens. Matter 22, 216001 (2010)
Physics
Condensed Matter
Other Condensed Matter
Scientific paper
10.1088/0953-8984/22/21/216001
We investigate the dynamics of domain wall in ferromagnetic nanowire with spin-transfer torque. The critical current condition is obtained analytically. Below the critical current, we get the static domain wall solution which shows that the spin-polarized current can't drive domain wall moving continuously. In this case, the spin-transfer torque plays both the anti-precession and anti-damping roles, which counteracts not only the spin-precession driven by the effective field but also Gilbert damping to the moment. Above the critical value, the dynamics of domain wall exhibits the novel screw-pitch effect characterized by the temporal oscillation of domain wall velocity and width, respectively. Both the theoretical analysis and numerical simulation demonstrate that this novel phenomenon arise from the conjunctive action of Gilbert-damping and spin-transfer torque. We also find that the roles of spin-transfer torque are entirely contrary for the cases of below and above the critical current.
Fu Guangsheng
Li Qiu-Yan
Li Zai-Dong
Liang Jing-Qiu
Liu Wei-Min
No associations
LandOfFree
Screw-pitch effect and velocity oscillation of domain-wall in ferromagnetic nanowire driven by spin-polarized current does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Screw-pitch effect and velocity oscillation of domain-wall in ferromagnetic nanowire driven by spin-polarized current, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Screw-pitch effect and velocity oscillation of domain-wall in ferromagnetic nanowire driven by spin-polarized current will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-94028