Journal
JOURNAL OF APPLIED PHYSICS
Volume 108, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3514070
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- FWF Austria [P21289-N16]
- Austrian Science Fund (FWF) [P 21289] Funding Source: researchfish
- Austrian Science Fund (FWF) [P21289] Funding Source: Austrian Science Fund (FWF)
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We study the switching-process of the magnetization in a ferromagnetic-normal-metal multilayer system by a spin polarized electrical current via the spin transfer torque. We use a spin drift-diffusion equation (SDDE) and the Landau-Lifshitz-Gilbert equation (LLGE) to capture the coupled dynamics of the spin density and the magnetization dynamic of the heterostructure. Deriving a fully analytic solution of the stationary SDDE we obtain an accurate, robust, and fast self-consistent model for the spin-distribution and spin transfer torque inside general ferromagnetic/ normal metal heterostructures. Using optimal control theory we explore the switching and back-switching process of the analyzer magnetization in a seven-layer system. Starting from a Gaussian, we identify a unified current pulse profile which accomplishes both processes within a specified switching time. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3514070]
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