{
  "id": "0803.0851",
  "version": "v1",
  "published": "2008-03-06T12:47:01.000Z",
  "updated": "2008-03-06T12:47:01.000Z",
  "title": "Low-temperature properties of the dilute dipolar magnet LiHo_xY_(1-x)F_4",
  "authors": [
    "A. Biltmo",
    "P. Henelius"
  ],
  "comment": "6 pages, 9 figures",
  "journal": "Phys. Rev. B 78, 054437 (2008)",
  "doi": "10.1103/PhysRevB.78.054437",
  "categories": [
    "cond-mat.stat-mech",
    "cond-mat.dis-nn",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We analyze recent experiments on the dilute rare-earth compound LiHo_xY_(1-x)F_4 in the context of an effective Ising dipolar model. Using a Monte Carlo method we calculate the low-temperature behavior of the specific heat and linear susceptibility, and compare our results to measurements. In our model the susceptibility follows a Curie-Weiss law at high temperature, chi ~ 1/(T-T_cw), with a Curie-Weiss temperature that scales with dilution, T_cw ~ x, consistent with early experiments. We also find that the peak in the specific heat scales linearly with dilution, C_max(T) ~ x, in disagreement with recent experiments. Experimental studies do not reach a consensus on the functional form of these quantities, and in particular we do not see reported scalings of the form chi ~ T^-0.75 and chi ~ exp(-T/T_0). Furthermore we calculate the ground state magnetization as a function of dilution, and re-examine the phase diagram around the critical dilution x_c=0.24(3). We find that the spin glass susceptibility for the Ising model does not diverge below x_c, while recent experiments give strong evidence for a stable spin-glass phase in LiHo_0.167Y_0.833F_4.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2008-03-06T12:47:01.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "75.10.Hk",
      "75.50.Lk",
      "75.40.Mg"
    ],
    "keywords": [
      "dilute dipolar magnet",
      "low-temperature properties",
      "experiments",
      "monte carlo method",
      "ground state magnetization"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2008,
      "month": "Aug",
      "volume": 78,
      "number": 5,
      "pages": "054437"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008PhRvB..78e4437B"
    }
  }
}