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Spin Torque Induced Magnetic Vortex Dynamics in Layered Nanopillars

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The main parameters of the spin polarized current induced magnetic vortex dynamics in tri-layer nanopillars of ferromagnet/non-magnetic spacer/ferromagnet, such as critical currents of the vortex steady oscillations and the oscillation frequencies, are calculated. To describe the vortex excitations by the spin polarized current a generalized Thiele approach to motion of the vortex core as a collective coordinate was used. All the calculation results are represented via the nanopillar layer sizes, saturation magnetization, and the Gilbert damping. The magnetization dynamics in the layers can be detected using giant magnetoresistance effect.


Document Type: Research Article


Publication date: 2012-04-01

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  • Journal of Spintronics and Magnetic Nanomaterials is an international multidisciplinary peer-reviewed journal reporting new developments in the fields of magnetic and spintronics materials including their synthesis, characterization, properties, and applications in electronics, photonics, telecommunications, computer sciences, medicine, health science, etc. JSM is the first journal devoted to the exciting field of spintronics, which is playing a fundamental role in the novel technological developments based on the new spin torque transfer phenomena.
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