{
  "id": "1509.07926",
  "version": "v1",
  "published": "2015-09-26T00:14:41.000Z",
  "updated": "2015-09-26T00:14:41.000Z",
  "title": "Spin relaxation near a ferromagnetic transition",
  "authors": [
    "Matthew D. Mower",
    "G. Vignale"
  ],
  "comment": "12 pages, 5 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We study spin relaxation in dilute magnetic semiconductors near a ferromagnetic transition, where spin fluctuations become strong. An enhancement in the scattering rate of itinerant carriers from the spin fluctuations of localized impurities leads to a change in the dominant spin relaxation mechanism from Dyakonov-Perel to spin flips in scattering. On the ferromagnetic side of the transition, we show that due to the presence of two magnetic components -- the itinerant carriers and the magnetic impurities -- with different gyromagnetic ratios, the relaxation rate of the total magnetization can be quite different from the relaxation rate of the spin. Following a disturbance of the equilibrium magnetization, the spin is initially redistributed between the two components to restore the equilibrium magnetization. It is only on a longer time scale, controlled by the spin-orbit interaction, that the total spin itself relaxes to its equilibrium state.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-09-26T00:14:41.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "ferromagnetic transition",
      "relaxation rate",
      "itinerant carriers",
      "equilibrium magnetization",
      "dominant spin relaxation mechanism"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}