Dependence of critical current of spin transfer torque-driven magnetization dynamics on free layer thickness

Details Dependence of critical current of spin transfer torque-driven magnetization dynamics on free layer thickness Dependence of critical current of spin transfer torque-driven magnetization dynamics on free layer thickness

2009-02-03

arxiv.org/abs/0902.0420v1

J. Appl. Phys. 105, 07D119 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

accepted by J. Appl. Phys. (Conference Proceedings of 53rd Annual Conference on Magnetism and Magnetic Materials)

Scientific paper

10.1063/1.3070622

The dependence of the critical current of spin transfer torque-driven magnetization dynamics on the free-layer thickness was studied by taking into account both the finite penetration depth of the transverse spin current and spin pumping. We showed that the critical current remains finite in the zero-thickness limit of the free layer for both parallel and anti-parallel alignments. We also showed that the remaining value of the critical current of parallel to anti-parallel switching is larger than that of anti-parallel to parallel switching.

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