Direct Observation of Large Amplitude Spin Excitations Localized in a Spin-Transfer Nanocontact

D. Backes; F. Macià; S. Bonetti; R. Kukreja; H. Ohldag; A. D. Kent

doi:10.1103/PhysRevLett.115.127205

Direct Observation of Large Amplitude Spin Excitations Localized in a Spin-Transfer Nanocontact

Mesoscale and Nanoscale Physics 2015-09-23 v1 Materials Science

Authors: D. Backes , F. Macià , S. Bonetti , R. Kukreja , H. Ohldag , A. D. Kent

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Abstract

We report the direct observation of large amplitude spin-excitations localized in a spin-transfer nanocontact using scanning transmission x-ray microscopy. Experiments were conducted using a nanocontact to an ultrathin ferromagnetic multilayer with perpendicular magnetic anisotropy. Element resolved x-ray magnetic circular dichroism images show an abrupt onset of spin excitations at a threshold current that are localized beneath the nanocontact, with average spin precession cone angles of 25{\deg} at the contact center. The results strongly suggest that we have observed a localized magnetic soliton.

Keywords

spin-transfer nanocontact spin excitations scanning transmission x-ray microscopy magnetic soliton perpendicular magnetic anisotropy ferromagnetic multilayer spin precession

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@article{arxiv.1504.00488,
  title  = {Direct Observation of Large Amplitude Spin Excitations Localized in a Spin-Transfer Nanocontact},
  author = {D. Backes and F. Macià and S. Bonetti and R. Kukreja and H. Ohldag and A. D. Kent},
  journal= {arXiv preprint arXiv:1504.00488},
  year   = {2015}
}

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5 pages, 3 figures

Direct Observation of Large Amplitude Spin Excitations Localized in a Spin-Transfer Nanocontact

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