{
  "id": "cond-mat/0703458",
  "version": "v2",
  "published": "2007-03-17T17:41:46.000Z",
  "updated": "2007-03-22T19:28:26.000Z",
  "title": "Large-amplitude coherent spin waves exited by spin-polarized current in nanoscale spin valves",
  "authors": [
    "I. N. Krivorotov",
    "D. V. Berkov",
    "N. L. Gorn",
    "N. C. Emley",
    "J. C. Sankey",
    "D. C. Ralph",
    "R. A. Buhrman"
  ],
  "comment": "24 pages, 4 figures, submitted to Physical Review B; in the 1st revised version some references were corrected",
  "doi": "10.1103/PhysRevB.76.024418",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We present spectral measurements of spin-wave excitations driven by direct spinpolarized current in the free layer of nanoscale Ir20Mn80/Ni80Fe20/Cu/Ni80Fe20 spin valves. The measurements reveal that large-amplitude coherent spin wave modes are excited over a wide range of bias current. The frequency of these excitations exhibits a series of jumps as a function of current due to transitions between different localized nonlinear spin wave modes of the Ni80Fe20 nanomagnet. We find that micromagnetic simulations employing the Landau-Lifshitz-Gilbert equation of motion augmented by the Slonczewski spin torque term (LLGS) accurately describe the frequency of the current-driven excitations including the mode transition behavior. However LLGS simulations give qualitatively incorrect predictions for the amplitude of excited spin waves as a function of current.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2007-03-22T19:28:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "large-amplitude coherent spin waves",
      "nanoscale spin valves",
      "nonlinear spin wave modes",
      "coherent spin wave modes",
      "spin-polarized current"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 24,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}