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@ARTICLE{Vitova:168874,
      author       = {Vitova, Tonya and Mangold, S. and Paulmann, Carsten and
                      Gospodinov and Marinova and Mihailova, Boriana},
      title        = {{X}-ray absorption spectroscopy of {R}u-doped relaxor
                      ferroelectrics with a perovskite-type structure},
      journal      = {Physical review / B},
      volume       = {89},
      number       = {14},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {DESY-2014-02701},
      pages        = {144112},
      year         = {2014},
      abstract     = {X-ray absorption near-edge structure and extended x-ray
                      absorption fine structure spectroscopy at the Ru K edge of
                      Ru-doped PbSc0.5Ta0.5O3 (PST-Ru), PbSc0.5Nb0.5O3 (PSN-Ru),
                      and 0.9PbZn1/3Nb2/3O3-0.1PbTiO3 (PZN-0.1PT-Ru) as well as at
                      the Ta L3 edge of PST-Ru and the Nb K edge of PSN-Ru was
                      applied to study the short- and intermediate-range atomic
                      arrangements in perovskite-type (ABO3) relaxor
                      ferroelectrics. The compounds were also analyzed by
                      complementary Raman scattering, visible/near-visible
                      absorption spectroscopy, and synchrotron x-ray
                      single-crystal diffraction. The results show that Ru is
                      octahedrally coordinated in all three relaxor host matrices
                      but the average oxidation state of Ru in PST-Ru and PSN-Ru
                      is ∼4.4, whereas it is ∼3.8 in PZN-0.1PT-Ru. In
                      PbSc0.5B''0.5O3 (B'' = Ta, Nb) Ru substitutes for the
                      B'' cations in the form of isolated point defects, while in
                      PZN-0.1PT-Ru Ru replaces adjacent A and B sites, forming a
                      chainlike structural species of face-sharing elongated
                      octahedra. Chemical 1:1 B-site order as well as dynamic BO6
                      tilting is observed around both the Ru dopant and the major
                      B'' cation in PST-Ru and PSN-Ru regardless of the fact that
                      according to x-ray diffraction at ambient conditions, the
                      average structure is cubic with weak or no long-range
                      chemical order. Pb cations are off-center displaced from the
                      prototypic cubic A site for all three compounds and in
                      Ru-doped PbSc0.5B''0.5O3 the BO6 tilt angle correlates with
                      the degree of coherent B-Pb distances.},
      cin          = {DOOR},
      ddc          = {530},
      cid          = {I:(DE-H253)HAS-User-20120731},
      pnm          = {DORIS Beamline F1 (POF2-54G13) / FS-Proposal: II-20100039
                      (II-20100039)},
      pid          = {G:(DE-H253)POF2-F1-20130405 / G:(DE-H253)II-20100039},
      experiment   = {EXP:(DE-H253)D-F1-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000335228100002},
      doi          = {10.1103/PhysRevB.89.144112},
      url          = {https://bib-pubdb1.desy.de/record/168874},
}