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@ARTICLE{Eichel:134817,
      author       = {Eichel, Rüdiger-A. and Erünal, Ebru and Jakes, Peter and
                      Körbel, Sabine and Elsässer, Christian and Kungl, Hans and
                      Acker, $Jéro^me$ and Hoffmann, Michael J.},
      title        = {{I}nteractions of defect complexes and domain walls in
                      {C}u{O}-doped ferroelectric ({K},{N}a){N}b{O}3123},
      journal      = {Applied physics letters},
      volume       = {102},
      number       = {24},
      issn         = {0003-6951},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {FZJ-2013-02892},
      pages        = {242908 -},
      year         = {2013},
      abstract     = {“Lead-free” piezoelectric sodium potassium niobate has
                      been studied with respect to its defect structure when
                      doping with CuO. The results indicate that two kinds of
                      mutually compensating charged defect complexes are formed,
                      (Cu′′′Nb−VO••)′ and
                      (VO••−Cu′′′Nb−VO••)•. Concerning the
                      interplay of these defect complexes with the piezoelectric
                      materials properties, the trimeric
                      (VO••−Cu′′′Nb−VO••)• defect complex
                      primarily has an elastic dipole moment and thus is proposed
                      to impact the electromechanical properties, whereas the
                      dimeric (Cu′′′Nb−VO••)′ defect possesses an
                      electric dipole moment in addition to an elastic distortion.
                      Both types of defect complexes can impede domain-wall motion
                      and may contribute to ferroelectric “hardening.”},
      cin          = {IEK-9},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {152 - Renewable Energies (POF2-152) / 123 - Fuel Cells
                      (POF2-123)},
      pid          = {G:(DE-HGF)POF2-152 / G:(DE-HGF)POF2-123},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000320962400080},
      doi          = {10.1063/1.4811268},
      url          = {https://juser.fz-juelich.de/record/134817},
}