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Controlling the synchronization properties of two dipolarly coupled vortex based spin-torque nano-oscillators by the intermediate of a third one
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, S. Tsunegi
, P. Bortolotti
, H. Kubota
, A. S. Jenkins
, M. Romera
, K. Yakushiji
, A. Fukushima
, J. Grollier
, S. Yuasa
, and V. Cros
, e-print arXiv:1601.01247
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In this paper, we propose to control the strength of phase-locking between two dipolarly coupled vortex based spin-torque nano-oscillators by placing an intermediate oscillator between them. We show through micromagnetic simulations that the strength of phase-locking can be largely tuned by a slight variation of current in the intermediate oscillator. We develop simplified numerical simulations based on analytical expressions of the vortex core trajectories that will be useful for investigating large arrays of densely packed spin-torque oscillators interacting through their stray fields.
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