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@ARTICLE{Korte:155404,
      author       = {Korte, Carsten and Keppner, Johannes and Peters, Andreas
                      and Schichtel, Nicole and Aydin, Halit and Janek, Jürgen},
      title        = {{C}oherency strain and its effect on ionic conductivity and
                      diffusion in solid electrolytes - {A}n improved model for
                      nanocrystalline thin films and review of experimental data},
      journal      = {Physical chemistry, chemical physics},
      volume       = {16},
      number       = {44},
      issn         = {1463-9076},
      address      = {Cambridge},
      publisher    = {RSC Publ.},
      reportid     = {FZJ-2014-04571},
      pages        = {24575-91},
      year         = {2014},
      abstract     = {A phenomenological and analytical model for the influence
                      of strain effects on atomic transport in columnar thin films
                      is presented. A model system consisting of two types of
                      crystalline thin films with coherent interfaces is assumed.
                      Biaxial mechanical strain ε0 is caused by lattice misfit of
                      the two phases. The conjoined films consist of columnar
                      crystallites with a small diameter l. Strain relaxation by
                      local elastic deformation, parallel to the hetero-interface,
                      is possible along the columnar grain boundaries. The spatial
                      extent δ0 of the strained hetero-interface regions can be
                      calculated, assuming an exponential decay of the
                      deformation-forces. The effect of the strain field on the
                      local ionic transport in a thin film is then calculated by
                      using the thermodynamic relation between (isostatic)
                      pressure and free activation enthalpy ΔG#. An expression
                      describing the total ionic transport relative to bulk
                      transport of a thin film or a multilayer as a function of
                      the layer thickness is obtained as an integral average over
                      strained and unstrained regions. The expression depends only
                      on known material constants such as Young modulus Y, Poisson
                      ratio ν and activation volume ΔV#, which can be combined
                      as dimensionless parameters. The model is successfully used
                      to describe own experimental data from conductivity and
                      diffusion studies. In the second part of the paper a
                      comprehensive literature overview of experimental studies on
                      (fast) ion transport in thin films and multilayers along
                      solid–solid hetero-interfaces is presented. By comparing
                      and reviewing the data the observed interface effects can be
                      classified into three groups: (i) transport along interfaces
                      between extrinsic ionic conductors (and insulator), (ii)
                      transport along an open surface of an extrinsic ionic
                      conductor and (iii) transport along interfaces between
                      intrinsic ionic conductors. The observed effects in these
                      groups differ by about five orders of magnitude in a very
                      consistent way. The modified interface transport in group
                      (i) is most probably caused by strain effects, misfit
                      dislocations or disordered transition regions.},
      cin          = {IEK-3},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-3-20101013},
      pnm          = {123 - Fuel Cells (POF2-123)},
      pid          = {G:(DE-HGF)POF2-123},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000344249400049},
      doi          = {10.1039/c4cp03055a},
      url          = {https://juser.fz-juelich.de/record/155404},
}