Enhancing the injection locking range of spin torque oscillators through mutual coupling

M. Romera; P. Talatchian; R. Lebrun; K. J. Merazzo; P. Bortolotti; L. Vila; J. D. Costa; R. Ferreira; P. P. Freitas; M. -C. Cyrille; U. Ebels; V. Cros; J. Grollier

doi:10.1063/1.4972346

Enhancing the injection locking range of spin torque oscillators through mutual coupling

Mesoscale and Nanoscale Physics 2019-05-07 v2

Authors: M. Romera , P. Talatchian , R. Lebrun , K. J. Merazzo , P. Bortolotti , L. Vila , J. D. Costa , R. Ferreira , P. P. Freitas , M. -C. Cyrille , U. Ebels , V. Cros , J. Grollier

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Abstract

We investigate how the ability of the vortex oscillation mode of a spin-torque nano-oscillator to lock to an external microwave signal is modified when it is coupled to another oscillator. We show experimentally that mutual electrical coupling can lead to locking range enhancements of a factor 1.64. Furthermore, we analyze the evolution of the locking range as a function of the coupling strength through experiments and numerical simulations. By uncovering the mechanisms at stake in the locking range enhancement, our results will be useful for designing spin-torque nano-oscillators arrays with high sensitivities to external microwave stimuli.

Keywords

nanomechanical resonators

Cite

@article{arxiv.1610.06172,
  title  = {Enhancing the injection locking range of spin torque oscillators through mutual coupling},
  author = {M. Romera and P. Talatchian and R. Lebrun and K. J. Merazzo and P. Bortolotti and L. Vila and J. D. Costa and R. Ferreira and P. P. Freitas and M. -C. Cyrille and U. Ebels and V. Cros and J. Grollier},
  journal= {arXiv preprint arXiv:1610.06172},
  year   = {2019}
}

Enhancing the injection locking range of spin torque oscillators through mutual coupling

Abstract

Keywords

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