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@INPROCEEDINGS{Dai:203500,
      author       = {Dai, Yang and cai, biya and Schubert, Jürgen and Hollmann,
                      Eugen and Wördenweber, Roger},
      title        = {{N}onlinear {D}ielectric {R}esponse in {A}nisotropically
                      {S}trained {E}pitaxial {F}erroelectric {F}ilms},
      reportid     = {FZJ-2015-05421},
      year         = {2015},
      abstract     = {Strain can not only strongly modify the electronic
                      characteristics of ferroelectric material, it can also
                      induce interesting partially novel properties in their
                      systems. In this work, the impact of ac and dc electric
                      field and field direction on the dielectric properties of
                      anisotropically strained epitaxial SrTiO3 films grown on
                      DyScO3 are examined. The anisotropic lattice mismatch
                      between the SrTiO3 film and DyScO3 leads to different
                      in-plane tensile strain in the different crystalline
                      direction of $0.95\%$ and $1.05\%,$ respectively. As a
                      result, (i) the tensile strain leads to an increase of the
                      ferroelectric-dielectric phase transition temperature to
                      Tmax=288 K and Tmax=258 K under large and small tensile
                      strain, respectively. (ii) With increasing amplitude of ac
                      electric field, the extrinsic contribution to the dielectric
                      permittivity increases nonlinearly, which indicates the
                      dynamic of domain wall is activated by the ac field. (iii)
                      The dielectric permittivity is strongly suppressed by an
                      additional dc bias electric field for the temperature
                      ranging from 180 K to 320 K. The different dielectric
                      responses are discussed in the term of domain wall dynamic
                      and pinning induced relaxor type model. Keywords:
                      anisotropic strain, thin films, ferroelectrics, domain
                      walls},
      month         = {Mar},
      date          = {2015-03-15},
      organization  = {DPG-Frühjahrstagung Berlin, Berlin
                       (Germany), 15 Mar 2015 - 20 Mar 2015},
      subtyp        = {Other},
      cin          = {PGI-8 / ICS-8 / JARA-FIT / PGI-9},
      cid          = {I:(DE-Juel1)PGI-8-20110106 / I:(DE-Juel1)ICS-8-20110106 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)PGI-9-20110106},
      pnm          = {523 - Controlling Configuration-Based Phenomena (POF3-523)},
      pid          = {G:(DE-HGF)POF3-523},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/203500},
}