Critical current of spin transfer torque-driven magnetization dynamics in magnetic multilayers

Details Critical current of spin transfer torque-driven magnetization dynamics in magnetic multilayers Critical current of spin transfer torque-driven magnetization dynamics in magnetic multilayers

2008-06-11

arxiv.org/abs/0806.1822v2

Phys. Rev. B 78, 224421 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 3 figures

Scientific paper

10.1103/PhysRevB.78.224421

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.

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