Clerc, M. G., Coulibaly, S., Laroze, D., León, A. O. and Núñez, Á. S. (2015) Alternating spin-polarized current induces parametric resonance in spin valves. Physical Review B, 91(1), 224426. (doi: 10.1103/PhysRevB.91.224426)
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Abstract
Ferromagnetic systems under the influence of spin-polarized currents exhibit rich spatiotemporal dynamics at nanoscales. We study spin-transfer nano-oscillators driven by the combination of alternating and direct spin-polarized electric currents. We show here that the alternating current induces parametric instabilities on spin valves, that is, the magnetization responses at half the forcing frequency. A spatial self-organization emerges as a result of the oscillatory current, which includes dissipative solitons and Faraday-type waves. The parametric regime is described analytically by means of the Landau-Lifshitz-Gilbert-Slonczewski equation, in good agreement with micromagnetic simulations including the full dipolar field.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Laroze, Dr David |
| Authors: | Clerc, M. G., Coulibaly, S., Laroze, D., León, A. O., and Núñez, Á. S. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Physical Review B |
| Publisher: | American Physical Society |
| ISSN: | 1098-0121 |
| ISSN (Online): | 1550-235X |
| Copyright Holders: | Copyright © 2015 American Physical Society |
| First Published: | First published in Physical Review B 91(1):224426 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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