{
  "id": "cond-mat/0602159",
  "version": "v3",
  "published": "2006-02-07T00:22:02.000Z",
  "updated": "2007-09-13T21:29:49.000Z",
  "title": "Spin-transfer in bilayer magnetic nanopillars at high fields as a function of free layer thickness",
  "authors": [
    "W. Chen",
    "A. D. Kent",
    "M. J. Rooks",
    "N. Ruiz",
    "J. Z. Sun"
  ],
  "comment": "5 Pages, 4 Figures",
  "journal": "Phys. Rev. B 74, 144408 (2006)",
  "doi": "10.1103/PhysRevB.74.144408",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Spin transfer in asymmetric Co/Cu/Co bilayer magnetic nanopillars junctions has been studied at low temperature as a function of free-layer thickness. The phase diagram for current-induced magnetic excitations has been determined for magnetic fields up to 7.5 T applied perpendicular to the junction surface and free-layers thicknesses from 2 to 5 nm. The junction magnetoresistance is independent of thickness. The critical current for magnetic excitations decreases linearly with decreasing free-layer thickness, but extrapolates to a finite critical current in the limit of zero thickness. The limiting current is in quantitative agreement with that expected due to a spin-pumping contribution to the magnetization damping. It may also be indicative of a decrease in the spin-transfer torque efficiency in ultrathin magnetic layers.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2007-09-13T21:29:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "free layer thickness",
      "high fields",
      "asymmetric co/cu/co bilayer magnetic nanopillars",
      "co/cu/co bilayer magnetic nanopillars junctions",
      "spin-transfer"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}