{
  "id": "1209.0298",
  "version": "v4",
  "published": "2012-09-03T10:35:54.000Z",
  "updated": "2014-04-03T16:21:30.000Z",
  "title": "Thermal fluctuations of magnetic nanoparticles",
  "authors": [
    "William T. Coffey",
    "Yuri P. Kalmykov"
  ],
  "comment": "an updated version with corrections; this version also includes our reply to a comment arXiv:1210.2436 by J.-L. Dejardin et al",
  "journal": "J. Appl. Phys. (Applied Physics Reviews) 112 (2012) 121301",
  "doi": "10.1063/1.4754272",
  "categories": [
    "cond-mat.stat-mech"
  ],
  "abstract": "The reversal time (superparamagnetic relaxation time) of the magnetization of fine single domain ferromagnetic nanoparticles owing to thermal fluctuations plays a fundamental role in information storage, paleomagnetism, biotechnology, etc. Here a comprehensive tutorial-style review of the achievements of fifty years of development and generalizations of the seminal work of Brown [W.F. Brown, Jr., Phys. Rev., 130, 1677 (1963)] on thermal fluctuations of magnetic nanoparticles is presented. Analytical as well as numerical approaches to the estimation of the damping and temperature dependence of the reversal time based on Brown's Fokker-Planck equation for the evolution of the magnetic moment orientations on the surface of the unit sphere are critically discussed while the most promising directions for future research are emphasized.",
  "revisions": [
    {
      "version": "v4",
      "updated": "2014-04-03T16:21:30.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "75.75.-c",
      "62.40.+i",
      "75.30.Cr",
      "75.50.Tt",
      "75.60.Jk",
      "75.70.Rf"
    ],
    "keywords": [
      "thermal fluctuations",
      "fine single domain ferromagnetic nanoparticles",
      "reversal time",
      "superparamagnetic relaxation time",
      "magnetic moment orientations"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "AIP",
      "journal": "Journal of Applied Physics",
      "year": 2012,
      "month": "Dec",
      "volume": 112,
      "number": 12,
      "pages": 1301
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012JAP...112l1301C"
    }
  }
}