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Title: Micromagnetic modeling with eddy current and current-induced spin torque effect
Authors: Wadhwa, P.
Jalil, M.B.A. 
Tan, S.G.
Issue Date: 2005
Source: Wadhwa, P., Jalil, M.B.A., Tan, S.G. (2005). Micromagnetic modeling with eddy current and current-induced spin torque effect. Journal of Applied Physics 98 (12) : -. ScholarBank@NUS Repository.
Abstract: We present a micromagnetic model which incorporates eddy current and spin transfer torque effects due to the passage of a spin-polarized current in the current-perpendicular-to-plane (CPP) geometry. Eddy current effects are modeled by solving Faraday's and Poisson's equations self-consistently with the Landau-Lifshitz-Gilbert (LLG) equation, whereas spin transfer torque is modeled by including the Slonczewski spin torque term in the LLG equation. We consider a 50 nm cubic Co element, which forms the free layer of a pseudo-spin-valve structure. With a typical damping parameter of α=0.5, the eddy currents act to accelerate the magnetic reversal process. The spin torque effect can also assist the reversal process but at high current densities exceeding Jext = 108 A cm2 onwards. At these current densities, spin transfer torque also causes a substantial reduction in the coercivity. © 2005 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.2142077
Appears in Collections:Staff Publications

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