Spin wave amplification using the spin Hall effect in permalloy/platinum bilayers

O. Gladii; M. Collet; K. Garcia-Hernandez; C. Cheng; S. Xavier; P. Bortolotti; V. Cros; Y. Henry; J. -V. Kim; A. Anane; M. Bailleul

doi:10.1063/1.4952447

Spin wave amplification using the spin Hall effect in permalloy/platinum bilayers

Materials Science 2016-06-22 v1

Authors: O. Gladii , M. Collet , K. Garcia-Hernandez , C. Cheng , S. Xavier , P. Bortolotti , V. Cros , Y. Henry , J. -V. Kim , A. Anane , M. Bailleul

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Abstract

We investigate the effect of an electrical current on the attenuation length of a 900 nm wavelength spin-wave in a permalloy/Pt bilayer using propagating spin-wave spectroscopy. The modification of the spin-wave relaxation rate is linear in current density, reaching up to 14% for a current density of 2.3 $\times10^{11}$ A/m $^2$ in Pt. This change is attributed to the spin transfer torque induced by the spin Hall effect and corresponds to an effective spin Hall angle of 0.13, which is among the highest values reported so far. The spin Hall effect thus appears as an efficient way of amplifying/attenuating propagating spin waves.

Keywords

spin hall effect

Cite

@article{arxiv.1603.05478,
  title  = {Spin wave amplification using the spin Hall effect in permalloy/platinum bilayers},
  author = {O. Gladii and M. Collet and K. Garcia-Hernandez and C. Cheng and S. Xavier and P. Bortolotti and V. Cros and Y. Henry and J. -V. Kim and A. Anane and M. Bailleul},
  journal= {arXiv preprint arXiv:1603.05478},
  year   = {2016}
}

Spin wave amplification using the spin Hall effect in permalloy/platinum bilayers

Abstract

Keywords

Cite

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