{
  "id": "0704.3656",
  "version": "v2",
  "published": "2007-04-27T15:25:37.000Z",
  "updated": "2007-04-29T10:18:17.000Z",
  "title": "Phase diagram of the dilute magnet LiHo_xY_{1-x}F_4",
  "authors": [
    "A. Biltmo",
    "P. Henelius"
  ],
  "comment": "5 pages, 4 figures",
  "journal": "Phys. Rev. B 76, 054423 (2007)",
  "doi": "10.1103/PhysRevB.76.054423",
  "categories": [
    "cond-mat.stat-mech",
    "cond-mat.dis-nn"
  ],
  "abstract": "We study the effective long-range Ising dipole model with a local exchange interaction appropriate for the dilute magnetic compound LiHo_{x}Y_{1-x}F_4. Our calculations yield a value of 0.12 K for the nearest neighbor exchange interaction. Using a Monte Carlo method we calculate the phase boundary T_c(x) between the ferromagnetic and paramagnetic phases. We demonstrate that the experimentally observed linear decrease in T_c with dilution is not the simple mean-field result, but a combination of the effects of fluctuations, the exchange interaction and the hyperfine coupling. Furthermore, we find a critical dilution x_c=0.21(2), below which there is no ordering. In agreement with recent Monte Carlo simulations on a similar model, we find no evidence of the experimentally observed freezing of the glassy state in our calculation. We apply the theory of Stephen and Aharony to LiHo_{x}Y_{1-x}F_4 and find that the theory does predict a finite-temperature freezing of the spin glass. Reasons for the discrepancies are discussed.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2007-04-29T10:18:17.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "75.10.Hk",
      "75.40.Mg",
      "75.50.Lk"
    ],
    "keywords": [
      "phase diagram",
      "nearest neighbor exchange interaction",
      "local exchange interaction appropriate",
      "effective long-range ising dipole model",
      "monte carlo simulations"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2007,
      "month": "Aug",
      "volume": 76,
      "number": 5,
      "pages": "054423"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2007PhRvB..76e4423B"
    }
  }
}