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@ARTICLE{Zembilgotov:47426,
      author       = {Zembilgotov, G. and Pertsev, N. A. and Waser, R.},
      title        = {{P}hase states of nanocrystalline ferroelectric ceramics
                      and their dielectric properties},
      journal      = {Journal of applied physics},
      volume       = {97},
      issn         = {0021-8979},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {PreJuSER-47426},
      pages        = {114315},
      year         = {2005},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Using a nonlinear thermodynamic theory, we describe
                      equilibrium polarization states and the macroscopic
                      dielectric response of nanocrystalline ferroelectric
                      ceramics with single-domain grains. The elastic clamping of
                      individual crystallites by the surrounding material is
                      explicitly taken into account via the introduction of a
                      specific thermodynamic potential. Aggregate material
                      properties are calculated with the aid of an iterative
                      procedure based on the method of effective medium. The
                      numerical calculations, performed for unpolarized BaTiO3 and
                      Pb(Zr1-xTix)O-3 ceramics, demonstrate that the equilibrium
                      phase states of nanocrystalline ceramics may differ
                      drastically from those of single crystals and coarse-grained
                      materials. Remarkably, the theory predicts the coexistence
                      of rhombohedral and tetragonal crystallites in
                      nanocrystalline Pb(Zr1-xTix)O-3 ceramics in a wide range of
                      compositions and temperatures. For BaTiO3 ceramics, a
                      mixture of rhombohedral and orthorhombic crystallites is
                      found to be the energetically most favorable state at room
                      temperature. The calculations also show that the dielectric
                      properties of nanocrystalline ferroelectric ceramics may be
                      very different from those of conventional materials due to
                      the elastic clamping of single-domain crystallites. (C) 2005
                      American Institute of Physics.},
      keywords     = {J (WoSType)},
      cin          = {IFF-IEM / CNI},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB321 / I:(DE-Juel1)VDB381},
      pnm          = {Materialien, Prozesse und Bauelemente für die Mikro- und
                      Nanoelektronik},
      pid          = {G:(DE-Juel1)FUEK252},
      shelfmark    = {Physics, Applied},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000229804700109},
      doi          = {10.1063/1.1924875},
      url          = {https://juser.fz-juelich.de/record/47426},
}