Agility of vortex-based nanocontact spin torque oscillators

M. Manfrini; T. Devolder; Joo-Von Kim; P. Crozat; N. Zerounian; C. Chappert; W. Van Roy; L. Lagae; G. Hrkac; T. Schrefl

doi:10.1063/1.3263727

Agility of vortex-based nanocontact spin torque oscillators

Mesoscale and Nanoscale Physics 2019-09-11 v1 Materials Science Applied Physics

Authors: M. Manfrini , T. Devolder , Joo-Von Kim , P. Crozat , N. Zerounian , C. Chappert , W. Van Roy , L. Lagae , G. Hrkac , T. Schrefl

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Abstract

We study the agility of current-tunable oscillators based on a magnetic vortex orbiting around a point contact in spin-valves. Theory predicts frequency-tuning by currents occurs at constant orbital radius, so an exceptional agility is anticipated. To test this, we have inserted an oscillator in a microwave interferometer to apply abrupt current variations while time resolving its emission. Using frequency shift keying, we show that the oscillator can switch between two stabilized frequencies differing by 25% in less than ten periods. With a wide frequency tunability and a good agility, such oscillators possess desirable figures of merit for modulation-based rf applications.

Keywords

spin current nanomechanical resonators

Cite

@article{arxiv.0910.1941,
  title  = {Agility of vortex-based nanocontact spin torque oscillators},
  author = {M. Manfrini and T. Devolder and Joo-Von Kim and P. Crozat and N. Zerounian and C. Chappert and W. Van Roy and L. Lagae and G. Hrkac and T. Schrefl},
  journal= {arXiv preprint arXiv:0910.1941},
  year   = {2019}
}

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3 pages, 3 figures

Agility of vortex-based nanocontact spin torque oscillators

Abstract

Keywords

Cite

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