{
  "id": "1308.6714",
  "version": "v1",
  "published": "2013-08-30T11:37:12.000Z",
  "updated": "2013-08-30T11:37:12.000Z",
  "title": "Energy dissipation of moved magnetic vortices",
  "authors": [
    "Martin P. Magiera"
  ],
  "comment": "6 pages, 6 figures",
  "journal": "Europhys. Lett. 103, 57004 (2013)",
  "doi": "10.1209/0295-5075/103/57004",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "A two-dimensional easy-plane ferromagnetic substrate, interacting with a dipolar tip which is magnetised perpendicular with respect to the easy plane is studied numerically by solving the Landau-Lifshitz Gilbert equation. The dipolar tip stabilises a vortex structure which is dragged through the system and dissipates energy. An analytical expression for the friction force in the v$\\rightarrow$0-limit based on the Thiele equation is presented. The limitations of this result which predicts a diverging friction force in the thermodynamic limit, are demonstrated by a study of the size dependence of the friction force. While for small system sizes the dissipation depends logarithmically on the system size, it saturates at a specific velocity dependent value. This size can be regarded as an effective vortex size and it is shown how this effective vortex size agrees with the infinite extension of a vortex in the thermodynamic limit. A magnetic friction number is defined which represents a general criterion for the validity of the Thiele equation and quantifies the degree of nonlinearity in the response of a driven spin configuration.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-08-30T11:37:12.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "moved magnetic vortices",
      "energy dissipation",
      "friction force",
      "dipolar tip",
      "thiele equation"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "EPL (Europhysics Letters)",
      "year": 2013,
      "month": "Sep",
      "volume": 103,
      "number": 5,
      "pages": 57004
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013EL....10357004M"
    }
  }
}