Critical current of spin transfer torque-driven magnetization dynamics in magnetic multilayers
arXiv:0806.1822 · doi:10.1103/PhysRevB.78.224421
Abstract
The critical current of the spin transfer torque-driven magnetization dynamics was studied by taking into account both spin pumping and the finite penetration depth of the transverse spin current. We successfully reproduced the recent experimental results obtained by Chen et al. [Phys. Rev. B {\bf 74}, 144408 (2006)] and found that the critical current remains finite even in the zero-thickness limit of the free layer. We showed that the remaining value of the critical current is determined mainly by spin pumping.
6 pages, 3 figures
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- Magnetization switching by current and microwaves
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- Shape anisotropy effect on magnetization reversal induced by linear down chirp pulse
- Proposal of an experimental scheme for determination of penetration depth of transverse spin current by a nonlocal spin valve
- Dependence of critical current of spin transfer torque-driven magnetization dynamics on free layer thickness