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

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 switc...

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Bibliographic Details
Published in:arXiv.org 2017-11
Main Authors: Li, Yi, de Milly, Xavier, Klein, Olivier, Cros, Vincent, Grollier, Julie, Grégoire de Loubens
Format: Article
Language:English
Subjects:
Coyotes
Frequency ranges
Frequency shift
Oscillators
Polarity
Switching theory
Synchronism
Torque
Vortices
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1711.02285