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Article Dans Une Revue Applied Physics Letters Année : 2018

Selective control of vortex polarities by microwave field in two robustly synchronized spin-torque nano-oscillators

Résumé

Manipulating operation states of coupled spin-torque nano-oscillators (STNOs), including their synchronization, is essential for applications such as complex oscillator networks. In this work we experimentally demonstrate selective control of two coupled vortex STNOs through microwave-assisted switching of their vortex core polarities. First, the two oscillators are shown to synchronize due to dipolar interaction in a broad frequency range tuned by external biasing field. Coherent output is demonstrated along with strong linewidth reduction. Then, we show individual vortex polarity control of each oscillator, which leads to synchronization/desynchronization due to accompanied frequency shift. Our methods can be easily extended to multiple-element coupled oscillator networks.
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Dates et versions

hal-01704720 , version 1 (08-02-2018)

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Yi Li, Xavier de Milly, Olivier Klein, Vincent Cros, Julie Grollier, et al.. Selective control of vortex polarities by microwave field in two robustly synchronized spin-torque nano-oscillators. Applied Physics Letters, 2018, 112 (2), pp.022405. ⟨10.1063/1.5012768⟩. ⟨hal-01704720⟩
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