{
  "id": "1001.4096",
  "version": "v2",
  "published": "2010-01-22T22:40:59.000Z",
  "updated": "2010-02-09T21:18:15.000Z",
  "title": "A new scattering mechanism of acoustic phonons in relaxor ferroelectrics: the case of KTa_{1-x}Nb_xO_3",
  "authors": [
    "J. Toulouse",
    "E. Iolin",
    "B. Hennion",
    "D. Petitgrand",
    "G. Yong",
    "R. Erwin"
  ],
  "comment": "10 pages, 4 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "The complex interaction between transverse acoustic (TA) phonon, transverse optic (TO) phonon and polar nano-domains (PND) in the relaxor ferroelectric KTa1-xNbxO3 (KTN) is studied by means of high resolution diffuse and inelastic neutron scattering. The experimental results and a comparison with lead relaxors, suggest a new scattering mechanism of the TA phonon by localized modes in PNDs. A theoretical model is developed, which accurately predicts the evolution of the TA damping with temperature and wavevector. Such a mechanism suggests the possible use of high frequency acoustic modes for the study of nanocomposite materials.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2010-02-09T21:18:15.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "scattering mechanism",
      "acoustic phonons",
      "high frequency acoustic modes",
      "relaxor ferroelectric kta1-xnbxo3",
      "high resolution diffuse"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010arXiv1001.4096T"
    }
  }
}