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

Abstract

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.

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

References in corpus (3)

• Enhancement of the Gilbert damping constant due to spin pumping in noncollinear ferromagnet/nonmagnet/ferromagnet trilayer systems
• Critical current of spin transfer torque-driven magnetization dynamics in magnetic multilayers
• Spin-transfer in bilayer magnetic nanopillars at high fields as a function of free layer thickness