A skyrmion-based spin-torque nano-oscillator

By F. García-Sánchez, J. Sampaio, N. Reyren, Vincent Cros, Joo-Von Kim. 2016

197 citations recorded by the source corpus.

A model for a spin-torque nano-oscillator based on the self-sustained oscillation of a magnetic skyrmion is presented. The system involves a circular nanopillar geometry comprising an ultrathin film free magnetic layer with a strong Dzyaloshinkii–Moriya interaction and a polariser layer with a vortex-like spin configuration. It is shown that spin-transfer torques due to current flow perpendicular to the film plane leads to skyrmion gyration that arises from a competition between geometric confinement due to boundary edges and the vortex-like polarisation of the spin torques. A phenomenology for such oscillations is developed and quantitative analysis using micromagnetics simulations is presented. It is also shown that weak disorder due to random anisotropy variations does not influence the main characteristics of the steady-state gyration.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/d5a4fb4cfb4ec05c1dcb7f55fe585f803f09ffc0

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In Atomic and Molecular Physics, and Optics

  1. Wanjun Jiang
  2. S. Velthuis
  3. J. Zang
  4. Gong Chen
  5. Kai Liu
  6. Axel Hoffmann

In Condensed Matter Physics

  1. Gong Chen
  2. Kai Liu
  3. Axel Hoffmann
  4. Wanjun Jiang
  5. J. Zang
  6. S. Velthuis

In Materials Chemistry

  1. Axel Hoffmann
  2. J. Zang

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