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5 PublikationenBipolar spin Hall nano-oscillators
Hache, T.; Li, Y.; Weinhold, T.; Scheumann, B.; Trindade Goncalves, F. J.; Hellwig, O.; Faßbender, J.; Schultheiß, H.
Abstract
We demonstrate a novel type of spin Hall nano-oscillators (SHNOs) that allow for efficient tuning of magnetic auto-oscillations over an extended range of gigahertz frequencies, using bipolar direct currents at constant magnetic fields. This is achieved by stacking two distinct magnetic materials with a platinum layer in between. In this device, the orientation of the spin polarised electrons accumulated at the top and bottom interfaces of platinum is switched upon changing the polarity of the direct current. As a result, the effective anti-damping required to drive large amplitude auto-oscillations can appear either at the top or bottom magnetic layer. Tuning of the auto-oscillation frequencies by several gigahertz can be obtained by combining two materials with suffciently different saturation magnetization. Here we show that the combination of NiFe and CoFeB can result in 3 GHz shifts in the auto-oscillation frequencies. Bipolar SHNOs as such may bring enhanced synchronisation capabilities to neuromorphic applications.
Keywords: magnetism; spin Hall; nano-oscillator; auto-oscillations; bipolar; oscillator; nanofabrication; microwave; high-frequency
Beteiligte Forschungsanlagen
- Ionenstrahlzentrum DOI: 10.17815/jlsrf-3-159
Verknüpfte Publikationen
- DOI: 10.17815/jlsrf-3-159 is cited by this (Id 30822) publication
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Bipolar spin Hall nano-oscillators
ROBIS: 30829 HZDR-primary research data are used by this (Id 30822) publication
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Applied Physics Letters 116(2020), 192405
DOI: 10.1063/5.0008988
Cited 12 times in Scopus -
Vortrag (Konferenzbeitrag)
(Online Präsentation)
65th Annual Conference on Magnetism and Magnetic Materials (MMM 2020), 02.-06.11.2020, virtual conference, virtual conference -
WWW-Beitrag
arXiv:2003.11776 [physics.app-ph]: https://arxiv.org/abs/2003.11776 -
Poster
(Online Präsentation)
The 2021 Around-the-Clock Around-the-Globe Magnetics Conference, 24.08.2021, global, global -
Poster
(Online Präsentation)
84. Annual Meeting of DPG and DPG-Tagung (DPG Meeting) of the Condensed Matter Section (SKM), 27.09.-01.10.2021, Deutschland, Deutschland
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Permalink: https://www.hzdr.de/publications/Publ-30822