Non-equilibrium thermodynamic study of magnetization dynamics in the presence of spin-transfer torque
| dc.creator | Seki, Kazuhiko | |
| dc.creator | Imamura, Hiroshi | |
| dc.date | 2008-05-21 | |
| dc.date.accessioned | 2026-07-07T09:54:53Z | |
| dc.date.available | 2026-07-07T09:54:53Z | |
| dc.description | The dynamics of magnetization in the presence of spin-transfer torque was studied. We derived the equation for the motion of magnetization in the presence of a spin current by using the local equilibrium assumption in non-equilibrium thermodynamics. We show that, in the resultant equation, the ratio of the Gilbert damping constant, $α$, and the coefficient, $β$, of the current-induced torque, called non-adiabatic torque, depends on the relaxation time of the fluctuating field $τ_{c}$. The equality $α=β$ holds when $τ_c$ is very short compared to the time scale of magnetization dynamics. We apply our theory to current-induced magnetization reversal in magnetic multilayers and show that the switching time is a decreasing function of $τ_{c}$. | |
| dc.description | 4 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/0805.3306 | |
| dc.identifier | http://arxiv.org/abs/0805.3306 | |
| dc.identifier | Phys. Rev. B 78, 060402(R) (2008) (4 pages) | |
| dc.identifier | doi:10.1103/PhysRevB.78.060402 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/166487 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.subject | Materials Science | |
| dc.title | Non-equilibrium thermodynamic study of magnetization dynamics in the presence of spin-transfer torque | |
| dc.type | text |