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@ARTICLE{Filatova:830554,
      author       = {Filatova, Elena O. and Egorova, Yulia V. and Galdina,
                      Kristina A. and Scherb, Tobias and Schumacher, Gerhard and
                      Bouwmeester, Henny J. M. and Baumann, Stefan},
      title        = {{E}ffect of {F}e content on atomic and electronic structure
                      of complex oxides {S}r({T}i,{F}e){O}$_{3−δ}$},
      journal      = {Solid state ionics},
      volume       = {308},
      issn         = {0167-2738},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2017-04086},
      pages        = {27 - 33},
      year         = {2017},
      abstract     = {We present a study of the electronic and atomic structure
                      of two series of SrTi1 − xFexO3 − δ (STFO) powders with
                      different Fe content produced by two different methods,
                      spray pyrolysis or modified Pechini synthesis, by means of
                      soft X-ray absorption spectroscopy. Partial substitution of
                      Ti by Fe atoms in SrTiO3 were found to cause asymmetric
                      distortion of TiO6 octahedrons, which increases with
                      increasing Fe content that may violate the cubic symmetry of
                      STFO. The presence mainly of Fe3 + states in octahedral
                      environment at small concentration of Fe atoms along with
                      essentially smaller content of Fe4 + states in octahedral
                      environment where the latter contribution increases with
                      increasing Fe content was traced. It is found that the
                      modified Pechini method allows to synthesize more stable
                      structures but a tendency of the SrOx formation in the
                      structure prepared by this technique was marked. The spray
                      pyrolysis method gives the structure free of SrO
                      precipitates but the presence of Fe3 + states in tetrahedral
                      environment with Fe content higher than $50\%$ and even a
                      certain amount of Fe2 + ions in an octahedral environment at
                      concentrations higher than $75\%$ in the STFO prepared by
                      this method was established. The O1s (K)-absorption spectra
                      point to increase in oxygen vacancy concentration with
                      increasing Fe content. The lowest degree of structure
                      distortions with enough high oxygen vacancy concentration
                      was traced in STFO (x = 0.25 to x = 0.35) produced by
                      modified Pechini synthesis, which makes it mostly
                      appropriate for technical applications, e.g., as gas
                      sensors, oxygen separation membranes or as fuel cell
                      material.},
      cin          = {IEK-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113)},
      pid          = {G:(DE-HGF)POF3-113},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000410012100005},
      doi          = {10.1016/j.ssi.2017.05.016},
      url          = {https://juser.fz-juelich.de/record/830554},
}