Improved spectral stability in spin transfer nano-oscillators: single vortex versus coupled vortices dynamics

Nicolas Locatelli; Romain Lebrun; Vladimir V. Naletov; Abbass Hamadeh; Grégoire De Loubens; Olivier Klein; Julie Grollier; Vincent Cros

doi:10.1109/TMAG.2015.2414903

Improved spectral stability in spin transfer nano-oscillators: single vortex versus coupled vortices dynamics

Mesoscale and Nanoscale Physics 2018-07-04 v1

Authors: Nicolas Locatelli , Romain Lebrun , Vladimir V. Naletov , Abbass Hamadeh , Grégoire De Loubens , Olivier Klein , Julie Grollier , Vincent Cros

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

We perform a comparative study of spin transfer induced excitation of the gyrotropic motion of a vortex core with either uniform or vortex spin polarizers. The microwave output voltage associated with the vortex dynamics, detected in both cases, displays a strong reduction of phase fluctuations in the case of the vortex polarizer, with a decrease of the peak linewidth by one order of magnitude down to 200kHz at zero field. A thorough study of rf emission features for the different accessible vortex configurations shows that this improvement is related to the excitation of coupled vortex dynamics by spin transfer torques.

Keywords

vortex matter in superconductors spin current vortex dynamics

Cite

@article{arxiv.1501.07839,
  title  = {Improved spectral stability in spin transfer nano-oscillators: single vortex versus coupled vortices dynamics},
  author = {Nicolas Locatelli and Romain Lebrun and Vladimir V. Naletov and Abbass Hamadeh and Grégoire De Loubens and Olivier Klein and Julie Grollier and Vincent Cros},
  journal= {arXiv preprint arXiv:1501.07839},
  year   = {2018}
}

Improved spectral stability in spin transfer nano-oscillators: single vortex versus coupled vortices dynamics

Abstract

Keywords

Cite

Related papers