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@ARTICLE{Du:188155,
      author       = {Du, Hongchu and Jia, Chun-Lin and Houben, Lothar and
                      Metlenko, Veronika and De Souza, Roger A. and Waser, R. and
                      Mayer, Joachim},
      title        = {{A}tomic structure and chemistry of dislocation cores at
                      low-angle tilt grain boundary in {S}r{T}i{O}3 bicrystals},
      journal      = {Acta materialia},
      volume       = {89},
      issn         = {1359-6454},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2015-01616},
      pages        = {344 - 351},
      year         = {2015},
      abstract     = {Dislocations in perovskite oxides have been found to have
                      important impacts on their electronic and ionic
                      transportation properties, which are believed to be related
                      to the structure and chemistry of dislocation cores. For
                      dislocation cores at a 6° low-angle [0 0 1] tilt grain
                      boundary in SrTiO3, an embedded TiOx rocksalt-like structure
                      has been suggested, consistent with a deficiency of Sr.
                      However, direct evidence supporting these suggestions has
                      not been obtained up to now. In this work, we reveal the
                      atomic structure and chemistry of edge dislocation cores at
                      a low-angle [0 0 1] symmetric tilt-boundary in SrTiO3
                      bicrystals by imaging techniques of high-angle annular
                      dark-field scanning transmission electron microscopy
                      (HAADF-STEM) and electron energy loss spectroscopy (EELS)
                      with an FEI Titan cube3 60–300 (PICO) microscope operated
                      at 80 kV. The experimental results demonstrate direct
                      evidence for a local coordination of edge-sharing TiO6
                      octahedra at the dislocation cores, which can be understood
                      as the result of strain. The local coordination of
                      edge-sharing TiO6 octahedra is associated with the
                      face-centered cubic (FCC) NaCl-type TiO phase. The present
                      study therefore provides a solid structural and chemical
                      basis for understanding the properties of dislocations.},
      cin          = {PGI-5 / PGI-7 / JARA-FIT},
      ddc          = {670},
      cid          = {I:(DE-Juel1)PGI-5-20110106 / I:(DE-Juel1)PGI-7-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000353249100033},
      doi          = {10.1016/j.actamat.2015.02.016},
      url          = {https://juser.fz-juelich.de/record/188155},
}