% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Rodenbcher:888942,
      author       = {Rodenbücher, Christian and Korte, Carsten and
                      Schmitz-Kempen, Thorsten and Bette, Sebastian and Szot,
                      Kristof},
      title        = {{A} {P}hysical {M}ethod for {I}nvestigating {D}efect
                      {C}hemistry in {S}olid {M}etal {O}xides},
      journal      = {APL materials},
      volume       = {9},
      issn         = {2166-532X},
      address      = {Melville, NY},
      publisher    = {AIP Publ.},
      reportid     = {FZJ-2020-05341},
      pages        = {011106},
      year         = {2021},
      abstract     = {The investigation of the defect chemistry of solid oxides
                      is of central importance for the understanding of redox
                      processes. This can be performed by measuring conductivity
                      as a function of the oxygen partial pressure, which is
                      conventionally established by using buffer gas mixtures or
                      oxygen pumps based on zirconia. However, this approach has
                      some limitations, such as difficulty in regulating oxygen
                      partial pressure in some intermediate-pressure regions or
                      the possibility of influencing the redox process by gases
                      that can also be incorporated into the oxide or react with
                      the surface via heterogeneous catalysis. Herein, we present
                      an alternative physical method in which the oxygen partial
                      pressure is controlled by dosing pure oxygen inside an
                      ultra-high vacuum chamber. To monitor the conductivity of
                      the oxide under investigation, we employ a dedicated
                      four-probe measurement system that relies on the application
                      of a very small AC voltage, in combination with lock-in data
                      acquisition using highly sensitive electrometers, minimizing
                      the electrochemical polarization or electro-reduction and
                      degradation effects. By analyzing the model material SrTiO3,
                      we demonstrate that its characteristic redox behavior can be
                      reproduced in good agreement with the theory when performing
                      simultaneous electrical conductivity relaxation and
                      high-temperature equilibrium conductivity measurements. We
                      show that the use of pure oxygen allows for a direct
                      analysis of the characteristic oxygen dose, which opens up
                      various perspectives for a detailed analysis of the surface
                      chemistry of redox processes.},
      cin          = {IEK-14},
      ddc          = {600},
      cid          = {I:(DE-Juel1)IEK-14-20191129},
      pnm          = {1231 - Electrochemistry for Hydrogen (POF4-123)},
      pid          = {G:(DE-HGF)POF4-1231},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000629950200004},
      doi          = {10.1063/5.0033891},
      url          = {https://juser.fz-juelich.de/record/888942},
}