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@INPROCEEDINGS{Eichel:155191,
      author       = {Eichel, Rüdiger-A.},
      title        = {{D}efect-{S}tructure - {P}roperty {R}elationships in
                      aliovalently doped and non-stoichiometric {P}erovskite
                      {O}xides},
      school       = {RWTH AAchen},
      reportid     = {FZJ-2014-04372},
      year         = {2014},
      note         = {Rüdiger-A. EichelInstitut für Energie- und Klimaforschung
                      (IEK-9), Forschungszentrum Jülich,
                      Germanyr.eichel@fz-juelich.de},
      abstract     = {Ferroelectric materials based on perovskite oxides offer
                      the advantage that materials properties may be
                      systematically tailored over a wide range either by
                      controlling the microstructre in terms of processing or by
                      means of aliovalent doping and defined non-stoichiometry
                      [1]. Although the strategy of introducing atomic-scale
                      defects that may form defect complexes, which in turn impact
                      the mobility of ferroelectric domain walls, is valid not
                      only for Pb[Zr,Ti]O3 (PZT), but also for lead-free
                      alternatives [2] such as [Bi,Na]TiO3 (BNT) or [K,Na]NbO3
                      (KNN) for instance, the corresponding defect structure when
                      using Fe2O3- or CuO-doping significantly differs from PZT
                      with tetravalent B-site to KNN where the B-site is
                      pentavalent.Focusing on 'hard' ferroelectrics, the
                      energetics for the formation of dimeric [3,4] and trimeric
                      [5,6] defect complexes between acceptor-type dopant ions and
                      charge compensating oxygen vacancies is considered both from
                      an experimental and theoretical perspective. Moreover, the
                      position of these defects with respect to domain walls [7],
                      their interaction with 180° and non-180° domain walls [5],
                      as well as the reorientation of the defect dipoles during
                      poling [8] is discussed.references:[1] R.-A. Eichel, H.
                      Kungl and P. Jakes, Mat. Tech. 28 (2013) 5 241[2] R.-A.
                      Eichel, H. Kungl, Funct. Mat. Lett. 3 (2010) 1–4[3] R.-A.
                      Eichel, P. Erhart, P. Träskelin, K. Albe, H. Kungl and M.J.
                      Hoffmann, Phys. Rev. Lett. 100 (2008) 095504[4] E. Aksel, E.
                      Erdem, P. Jakes, J.L. Jones and R.-A. Eichel, Appl. Phys.
                      Lett. 97 (2010) 012903[5] R.-A. Eichel, E. Erünal, P.
                      Jakes, S. Körbel, C. Elsässer, H. Kungl, J. Acker and M.J.
                      Hoffmann, Appl. Phys. Lett. 102 (2013) 242908[6] E. Erünal,
                      P. Jakes, S. Körbel, J. Acker, H. Kungl, C. Elsässer, M.J.
                      Hoffmann and R.-A. Eichel, Phys. Rev. B 84, (2011) 184113[7]
                      P. Jakes, E. Erdem, R.-A. Eichel, L. Jin and D. Damjanovic,
                      Appl. Phys. Lett. 98 (2011) 072907[8] L.X. Zhang, E. Erdem,
                      X. Ren and R.-A. Eichel, Appl. Phys. Lett. 93 (2008) 202901},
      month         = {Aug},
      date          = {2014-08-01},
      organization  = {International Symposium on Advanced
                       Functional Materials, Kuala Lumpur
                       (Malaysia), 1 Aug 2014 - 2 Aug 2014},
      subtyp        = {Plenary/Keynote},
      cin          = {IEK-9},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {152 - Renewable Energies (POF2-152)},
      pid          = {G:(DE-HGF)POF2-152},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/155191},
}