{
  "id": "cond-mat/0403435",
  "version": "v1",
  "published": "2004-03-17T17:39:13.000Z",
  "updated": "2004-03-17T17:39:13.000Z",
  "title": "Evidence for the S=9 excited state in Mn12-bromoacetate measured by electron paramagnetic resonance",
  "authors": [
    "K. Petukhov",
    "S. Hill",
    "N. E. Chakov",
    "G. Christou",
    "K. Abboud"
  ],
  "doi": "10.1103/PhysRevB.70.054426",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We present high-frequency high-field electron paramagnetic resonance (EPR) measurements on the dodecanuclear manganese complex Mn12-bromoacetate (Mn12-BrAc). The crystal-field parameters are found to be identical to those of the original compound Mn12-acetate (Mn12-Ac). A detailed analysis of the frequency and temperature dependence of anomalous peaks observed in the EPR spectra of Mn12-BrAc enables us to locate the S=9 manifold at about 40 K above the Ms= +/-10 ground state of this nominally S=10 system. This is very close to the Ms = +/-6 state of the S = 10 manifold, thus suggesting pathways for the thermally assisted magnetization dynamics and related properties. Finally, the EPR fine structures recently attributed to disorder associated with the acetic acid of crystallization in Mn12-Ac are absent in the present measurements, thus suggesting that the Mn12-BrAc complex represents a more suitable candidate for measurements of quantum effects in high symmetry S=10 SMMs.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2004-03-17T17:39:13.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "excited state",
      "high-frequency high-field electron paramagnetic resonance",
      "dodecanuclear manganese complex mn12-bromoacetate",
      "measurements"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}