% 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{Mowe:1044112,
      author       = {Mowe, Patrick and Pfeiffer, Felix and Maus, Oliver and
                      Zeier, Wolfgang and Winter, Martin and Neuhaus, Kerstin},
      title        = {{R}elationship between structure and room-temperature
                      charge transport in highly acceptor-doped ceria and
                      zirconia},
      journal      = {Solid state ionics},
      volume       = {428},
      issn         = {0167-2738},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2025-03028},
      pages        = {116955},
      year         = {2025},
      abstract     = {Even though mainly known for intermediate to high
                      temperature applications, highly acceptor doped ceria and
                      zirconia are potential candidates for use as proton
                      conductive membranes or for electro-chemo-X devices, which
                      requires comparably high ionic conductivity at room
                      temperature. In this study, the composition La2Ce2O7,
                      Y2Zr2O7 and La2Zr2O7 were prepared via Pechini synthesis,
                      followed by calcination, pellet pressing and sintering. The
                      received pellets were characterized by X-ray diffraction
                      (XRD), X-ray pair distribution function analyses (XPDF), and
                      Raman spectroscopy showing La2Zr2O7 as a pyrochlore, a
                      global fluorite structure in Y2Zr2O7 and La2Ce2O7 as
                      defective pyrochlore structure with local disorder. The
                      investigation of electrical properties using classical
                      electrochemical methods, such as electrochemical impedance
                      spectroscopy (EIS), is constrained by very low electrical
                      conductivity at room temperature for the investigated
                      ceramics. To enable measurements at room temperature, and
                      with a focus on the surface-near transport properties, a
                      combination of Kelvin Probe Force Microscopy (KPFM) and
                      local polarization-relaxation measurements has been employed
                      in this study. The application of KPFM-based
                      polarization-relaxation measurements enabled the successful
                      determination of diffusion coefficients in both dry and wet
                      environments by employing positive or negative polarization
                      voltages with highest values for the defective pyrochlore
                      La2Ce2O7. Additionally, KPFM measurements were used to
                      analyze the local potential distribution at the grain
                      boundaries. The results are discussed in the context of a
                      defect model.},
      cin          = {IMD-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IMD-4-20141217},
      pnm          = {1221 - Fundamentals and Materials (POF4-122) / DFG project
                      G:(GEPRIS)523164409 - Protonenleitfähigkeit bei
                      Raumtemperatur in hydratisierten Pyrochlor-Materialien
                      (523164409)},
      pid          = {G:(DE-HGF)POF4-1221 / G:(GEPRIS)523164409},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001534877700001},
      doi          = {10.1016/j.ssi.2025.116955},
      url          = {https://juser.fz-juelich.de/record/1044112},
}