Parametric oscillator based on non-linear vortex dynamics in low resistance magnetic tunnel junctions
| Autor: | Bernard Dieny, Christophe Hoarau, S. Y. Martin, Y. Conraux, C. Thirion, N. de Mestier, C. Baraduc |
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| Přispěvatelé: | Micro et NanoMagnétisme (NEEL - MNM), Institut Néel (NEEL), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), SPINtronique et TEchnologie des Composants (SPINTEC), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Electronique (NEEL - ElecLab), Micro et NanoMagnétisme (MNM), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Electronique (ElecLab) |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Physics
Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Oscillation FOS: Physical sciences Spectral density 02 engineering and technology Fundamental frequency 021001 nanoscience & nanotechnology Condensed Matter Physics 7. Clean energy 01 natural sciences Electronic Optical and Magnetic Materials Vortex Synchronization (alternating current) Vackář oscillator [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other] Harmonics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Parametric oscillator 010306 general physics 0210 nano-technology ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Physical Review B: Condensed Matter and Materials Physics (1998-2015) Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2011, 84 (14), pp.144434. ⟨10.1103/PhysRevB.84.144434⟩ Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2011, 84 (14), pp.144434. ⟨10.1103/PhysRevB.84.144434⟩ Physical Review B |
| ISSN: | 1098-0121 1550-235X |
| DOI: | 10.1103/PhysRevB.84.144434⟩ |
| Popis: | Radiofrequency vortex spin-transfer oscillators based on magnetic tunnel junctions with very low resistance area product were investigated. A high power of excitations has been obtained characterized by a power spectral density containing a very sharp peak at the fundamental frequency and a series of harmonics. The observed behaviour is ascribed to the combined effect of spin transfer torque and Oersted-Amp\`ere field generated by the large applied dc-current. We furthermore show that the synchronization of a vortex oscillation by applying a ac bias current is mostly efficient when the external frequency is twice the oscillator fundamental frequency. This result is interpreted in terms of a parametric oscillator. Comment: 4 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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