{
  "id": "0711.4560",
  "version": "v1",
  "published": "2007-11-28T19:14:07.000Z",
  "updated": "2007-11-28T19:14:07.000Z",
  "title": "Ab initio studies of the spin-transfer torque in tunnel junctions",
  "authors": [
    "Christian Heiliger",
    "M. D. Stiles"
  ],
  "comment": "5 pages, 4 figures",
  "doi": "10.1103/PhysRevLett.100.186805",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We calculate the spin-transfer torque in Fe/MgO/Fe tunnel junctions and compare the results to those for all-metallic junctions. We show that the spin-transfer torque is interfacial in the ferromagnetic layer to a greater degree than in all-metallic junctions. This result originates in the half metallic behavior of Fe for the $\\Delta_1$ states at the Brillouin zone center; in contrast to all-metallic structures, dephasing does not play an important role. We further show that it is possible to get a component of the torque that is out of the plane of the magnetizations and that is linear in the bias. However, observation of such a torque requires highly ideal samples. In samples with typical interfacial roughness, the torque is similar to that in all-metallic multilayers, although for different reasons.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2007-11-28T19:14:07.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.63.-b",
      "73.40.Gk",
      "75.70.Cn",
      "85.75.-d"
    ],
    "keywords": [
      "spin-transfer torque",
      "ab initio studies",
      "all-metallic junctions",
      "half metallic behavior",
      "fe/mgo/fe tunnel junctions"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2008,
      "month": "May",
      "volume": 100,
      "number": 18,
      "pages": 186805
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvL.100r6805H"
    }
  }
}