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@ARTICLE{Rheinheimer:887839,
      author       = {Rheinheimer, Wolfgang and Fülling, Manuel and Hoffmann,
                      Michael J.},
      title        = {{G}rain growth in weak electric fields in strontium
                      titanate: {G}rain growth acceleration by defect
                      redistribution},
      journal      = {Journal of the European Ceramic Society},
      volume       = {36},
      number       = {11},
      issn         = {0955-2219},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-04465},
      pages        = {2773 - 2780},
      year         = {2016},
      abstract     = {The impact of DC electric fields on grain growth in
                      strontium titanate is investigated between 1350 °C and 1550
                      °C for fields of up to 50 V/mm. To prevent joule heating by
                      electrical currents, insulating Al2O3 plates separate
                      electrodes from samples. The seeded polycrystal technique is
                      used, which allows evaluating gradients induced by electric
                      fields. The growth direction of the single crystalline seeds
                      is perpendicular to the electric field; hence electrostatic
                      forces do not influence its growth. Below 1425 °C, the
                      influence of electric fields is very weak. Above 1425 °C
                      the field results in an increase of the grain boundary
                      mobility at the negative electrode.The enhancement of the
                      boundary mobility at the negative electrode is attributed to
                      electric field induced defect redistribution. Oxygen
                      vacancies migrate towards the negative electrode, while
                      strontium vacancies accumulate at the positive electrode.
                      This defect redistribution is connected to the defect
                      chemistry dependent grain growth in strontium titanate.},
      cin          = {IEK-1},
      ddc          = {660},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000376808100016},
      doi          = {10.1016/j.jeurceramsoc.2016.04.033},
      url          = {https://juser.fz-juelich.de/record/887839},
}