{
  "id": "0912.0483",
  "version": "v1",
  "published": "2009-12-02T18:17:47.000Z",
  "updated": "2009-12-02T18:17:47.000Z",
  "title": "Role of dipolar interactions in a system of Ni nanoparticles studied by magnetic susceptibility measurements",
  "authors": [
    "S. H. Masunaga",
    "R. F. Jardim",
    "P. F. P. Fichtner",
    "J. Rivas"
  ],
  "comment": "7 pages, 5 figures, 3 tables",
  "journal": "Physical Review B 80, 184428 (2009)",
  "doi": "10.1103/PhysRevB.80.184428",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "The role of dipolar interactions among Ni nanoparticles (NP) embedded in an amorphous SiO2/C matrix with different concentrations has been studied performing ac magnetic susceptibility Chi_ac measurements. For very diluted samples, with Ni concentrations < 4 wt % Ni or very weak dipolar interactions, the data are well described by the Neel-Arrhenius law. Increasing Ni concentration to values up to 12.8 wt % Ni results in changes in the Neel-Arrhenius behavior, the dipolar interactions become important, and need to be considered to describe the magnetic response of the NPs system. We have found no evidence of a spin-glasslike behavior in our Ni NP systems even when dipolar interactions are clearly present.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-12-02T18:17:47.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "75.47.Lx",
      "75.50.Kj",
      "71.30.+h"
    ],
    "keywords": [
      "magnetic susceptibility measurements",
      "ni nanoparticles",
      "ni concentration",
      "ni np systems",
      "performing ac magnetic susceptibility"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review B",
      "year": 2009,
      "month": "Nov",
      "volume": 80,
      "number": 18,
      "pages": 184428
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvB..80r4428M"
    }
  }
}