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@ARTICLE{Roelofs:30049,
      author       = {Roelofs, A. and Schneller, T. and Szot, K. and Waser, R.},
      title        = {{P}iezoresponse force microscopy of lead titanate
                      nanograins possibly reaching the limit of ferroelectricity},
      journal      = {Applied physics letters},
      volume       = {81},
      issn         = {0003-6951},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {PreJuSER-30049},
      pages        = {5231 - 5233},
      year         = {2002},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Single ferroelectric lead titanate (PTO) grains down to 15
                      nm were fabricated by chemical solution deposition. Varying
                      the dilution of the precursor solution leads to different
                      grain sizes between 15 and 200 nm. The grain-size-dependent
                      domain configuration was studied using three-dimensional
                      piezoresponse force microscopy (PFM). It is found that the
                      PTO. grains in a dense film contain laminar 90degrees domain
                      walls, whereas separated PTO grains show more complicated
                      structures of mainly 180degrees domain walls. For grains
                      smaller than 20 rim, no piezoresponse was observed and we
                      suppose this could be due to the transition from the
                      ferroelectric to the superparaelectric phase which has no
                      spontaneous polarization. Recent calculations showed that
                      the ferroelectricity of fine ferroelectric particles
                      decrease with decreasing particle size. From these
                      experiments the extrapolated critical size of PTO. particles
                      was found to be around 4-14 nm. (C) 2002 American Institute
                      of-Physics.},
      keywords     = {J (WoSType)},
      cin          = {IFF-EKM},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB35},
      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:000180160800045},
      doi          = {10.1063/1.1534412},
      url          = {https://juser.fz-juelich.de/record/30049},
}