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@ARTICLE{Tober:631049,
      author       = {Tober, Steffen and Schober, Jan-Christian and Creutzburg,
                      Marcus and Beck, Esko Erik and Semione, Guilherme Dalla Lana
                      and Chung, Simon and Jacobse, Leon and Arndt, Bjoern and
                      Vlad, Alina and Steinbrügge, René and Wille,
                      Hans-Christian and Sergeev, Ilya and Noei, Heshmat and
                      Schlage, Kai and Leupold, Olaf and Vonk, Vedran and Stierle,
                      Andreas},
      title        = {{S}ite-{R}esolved {N}ear-{S}urface {C}ation {D}iffusion in
                      {M}agnetite},
      journal      = {Physical review letters},
      volume       = {134},
      number       = {23},
      issn         = {0031-9007},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PUBDB-2025-01918},
      pages        = {236203},
      year         = {2025},
      abstract     = {In situ nuclear forward scattering shows a thermally
                      induced cation exchange between a 57 Fe3 ⁢O4 thin-film and
                      a Fe3⁢ O4 (001) substrate predominantly in the octahedral
                      sublattice for a temperature range between 470 and 710 K.
                      The overall activation barrier in this temperature range is
                      found to be 19±32  kJ/mol, which is significantly lower
                      than expected from extrapolating a bulk diffusion model.
                      This observation can be attributed to the large
                      out-of-equilibrium cation deficit as determined by surface
                      x-ray diffraction. Despite the relatively low hopping
                      barrier, the diffusion constant is about 5 orders of
                      magnitude lower than expected for magnetite having an
                      equilibrium cation stoichiometry. The results are relevant
                      for applications relying on the near-surface structure and
                      stoichiometry of magnetite, and we argue that the
                      correlation between cation diffusion and stoichiometry may
                      play a role for a wider range of oxide materials.},
      cin          = {FS-NL / FS-PETRA-S},
      ddc          = {530},
      cid          = {I:(DE-H253)FS-NL-20120731 / I:(DE-H253)FS-PETRA-S-20210408},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / SFB 986 C07 - Deposition und
                      Stabilität von hochtemperaturfesten geschichteten
                      Metamaterialien (C07) (318029273) / DFG project
                      G:(GEPRIS)192346071 - SFB 986: Maßgeschneiderte
                      Multiskalige Materialsysteme - M3 (192346071)},
      pid          = {G:(DE-HGF)POF4-632 / G:(GEPRIS)318029273 /
                      G:(GEPRIS)192346071},
      experiment   = {EXP:(DE-H253)Nanolab-01-20150101 /
                      EXP:(DE-H253)Nanolab-02-20150101 /
                      EXP:(DE-H253)Nanolab-03-20150101 /
                      EXP:(DE-H253)P-P01-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1103/PhysRevLett.134.236203},
      url          = {https://bib-pubdb1.desy.de/record/631049},
}