Single spin-torque vortex oscillator using combined bottom-up approach and e-beam lithography

F. Abreu Araujo; L. Piraux; V. A. Antohe; V. Cros; L. Gence

doi:10.1063/1.4808451

Single spin-torque vortex oscillator using combined bottom-up approach and e-beam lithography

Materials Science 2015-06-12 v2

Authors: F. Abreu Araujo , L. Piraux , V. A. Antohe , V. Cros , L. Gence

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Abstract

A combined bottom-up assembly of electrodeposited nanowires and electron beam lithography technique has been developed to investigate the spin transfer torque and microwave emission on specially designed nanowires containing a single Co/Cu/Co pseudo spin valve. Microwave signals have been obtained even at zero magnetic field. Interestingly, high frequency vs. magnetic field tunability was demonstrated, in the range 0.4 - 2 MHz/Oe, depending on the orientation of the applied magnetic field relative to the magnetic layers of the pseudo spin valve. The frequency values and the emitted signal frequency as a function of the external magnetic field are in good quantitative agreement with the analytical vortex model as well as with micromagnetic simulations.

Keywords

spin waves magnetic resonance spin current

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@article{arxiv.1301.3431,
  title  = {Single spin-torque vortex oscillator using combined bottom-up approach and e-beam lithography},
  author = {F. Abreu Araujo and L. Piraux and V. A. Antohe and V. Cros and L. Gence},
  journal= {arXiv preprint arXiv:1301.3431},
  year   = {2015}
}

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9 pages, 4 figures

Single spin-torque vortex oscillator using combined bottom-up approach and e-beam lithography

Abstract

Keywords

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